ALA CYCLES, focused on THE MTB bike, E SCOOTER BIKE, CARGO bike/tricycles, SINCE 2012.

add:Ningbo High Tech zone,Zhejiang.

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the Introduction to MTB E bike Parts

  1. Mountain Bike | Mountain Bike

Wikipedia’s definition of “mountain bike” is “a bicycle designed to be ridden on mountain off-road terrain”, including XC, FR, DH and other models for various purposes.

  1. Road bike | Road Bike

Wikipedia defines “road bike” as “a type of bicycle used on smooth road surfaces”, including models for various purposes such as large group vehicles, TT vehicles, and triathlon vehicles.

  1. Dead Speed ​​Bike | Fixed Gear Bike
  2. ATV | Cruiser Bike

The English name is Cruiser, which was originally a kind of scooter popular in the United States. The meaning of Cruiser is also “going leisurely and at a constant speed”, so I think the current Chinese names “ATV”, “Prince car” and so on are actually It’s not very suitable, it’s just a very common kind of scooter.

  1. Folding Bike | Folding Bike

There are various folding methods such as horizontal folding and vertical folding.

  1. Derailleur/Derailleur | Derailleur

The exact name of the derailleur is “derailleur”, which uses a mechanical device to shift the chain to different chainrings to achieve different gear ratios.

  1. Front Derailleur | Front Derailleur

What riders call “front derailleur” is actually the abbreviation of “front derailleur”, which uses Cage to move the chain to different chainrings of the chainring.

  1. Rear Derailleur | Rear Derailleur

What riders call “rear derailleur” is actually the abbreviation of “rear derailleur”, which guides the chain to the different chainrings of the flywheel through the guide wheel.

  1. Internal gear shift | Hub Gear

Internal shifting is a device that uses planetary gears to achieve shifting, located in the hub, and the gear ratio of the cassette to the chainring is fixed.

  1. Electric/electronic variable speed | Electronic Derailleur

The transmission that drives the transmission is controlled using an electric motor rather than a mechanical cable.

  1. Rear derailleur upper guide wheel | Jockey Pulley/Guide Pulley

The upper one of the two rear derailleur pulleys is used to shift the chain to the desired sprocket chainring.

  1. Rear derailleur pulley | Tension Pulley

The lower one of the two rear derailleur pulleys is used to stabilize the chain and maintain chain tension.

  1. Top-Pull Front Derailleur

The wiring method is the front derailleur pulled from above the front derailleur through the riser.

  1. Bottom-Pull Front Derailleur

The wiring method is the front derailleur pulled from the bottom of the front derailleur through the bottom bracket.

  1. Dial/hand change | Shifter

Equipment used to operate transmissions. Some mountain bikes also use handlebars, and some road bikes also use beams.

  1. Crankset | Chainring/Crankset/Chainset

Generally, Chainring or Chainwheel refers to the chainring group of the chainring, and Crankset or Chainset refers to the whole chainring, including the chainring and the crank.

  1. Flywheel | Cassette/Cogset

Although it is called “flywheel” in Chinese, the corresponding English word is not Flywheel. Flywheel generally refers to an inertial device used to maintain the operation of an internal combustion engine, such as the “flywheel” in a car engine. The two flywheels have little in common except that they both rotate. The English name of the bicycle “flywheel” is Cassette or Cogset.

  1. Ratchet | Freewheel

In addition to the dead fly, the flywheel will drive the hub to rotate when the pedal is stepped forward, but not when the pedal is stopped or reversed. This is achieved by the ratchet device located inside the flywheel or freewheel, and its English name is Freewheel.

  1. Spin-on | Thread-on Freewheel/Cassette

In the form of a flywheel, the ratchet device is integrated in the flywheel, and the flywheel is fixed on the hub through threads. Ordinary scooters, mountain bikes and road bikes below 1,000 yuan generally use spin fly.

  1. Cassette

A form of flywheel in which the ratchet device is located in the freewheel body connected to the hub, and the flywheel is just a set of chainrings without a ratchet device. The flywheel is interlocked with the freewheel body through grooves and locked by the flywheel cover. Mountain bikes and road bikes costing more than 1,000 yuan generally use Kafei. Since most current sports bikes with 7-speed and above use the stick-fly system, Cassette defaults to stick-fly.

  1. Freehub

The device used to install the fly, there is a ratchet device inside it to connect with the hub.

  1. Crank | Crankarm

The device on the chainring used to fix the pedals and provide a moment arm when pedaling.

  1. Pedal | Pedal

This one needs no introduction… no one will confuse pedals with bicycles…

  1. Locking pedal/self-locking pedal | Clipless Pedal

What riders call “lock pedal” is the abbreviation of “self-locking pedal”. This kind of pedal needs to be used with a special locking shoe. By rigidly connecting the locking shoe and the locking pedal, the pedaling efficiency is improved. (see image above)

  1. Flat pedal | Simple Platform Pedal

Most non-lock pedals are flat pedals, that is, pedals that can be used with ordinary shoes and have no mechanical locking device.

  1. Chain | Chain

The chain is divided into single-speed and 6, 7, 8, 9, 10 and other speed categories. Due to the different thickness and spacing of the flywheel chainrings of different speeds, chains of different speeds are generally not universal. In addition, since the chain is one of the few parts of a bicycle that does not have a bearing structure, a good chain actually requires a lot of careful design by engineers. A good chain must not only be light, but also meet the strength requirements, as well as lubricate and prevent rust, which is very technical. The picture below is a screenshot of KMC’s official website. The small holes on the chain wall in the picture can speed up the discharge of mud during mountain biking, and at the same time, it can also steal light.

  1. Magic buckle | Powerlink/Powerlock/Master Link/Chain Connector

The magic buckle is a tool used to connect the chain and facilitate the disassembly of the chain. When disassembling, it can be done with the chain holder + small pliers, and it can be tightened by hand when connecting. In addition, the magic buckle also has a magical effect, that is, after the chain is broken, the chain can be connected by adding a magic buckle, so that there is no need to buy a new chain, and the effect is better than cutting the chain. Like the chain, the magic buckle is also different. (Although this is a 9-speed magic buckle temporarily used on an 8-speed chain…)

  1. Gear ratio | Gear Ratio

The ratio of the number of teeth of the chainring to the cassette. The traditional three-piece chainring of mountain bikes can achieve a gear ratio lower than 1:1. The gear ratio of general road bikes is denser than that of mountain bikes, and the coverage is not as good as that of mountain bikes. During road car races, participants will choose different flywheels according to road conditions, and in XC races, Pros will choose single-wheel systems with different numbers of teeth according to the terrain, all in order to achieve the optimal gear ratio.

  1. Front Fork | Fork

The front fork is a component used to connect the front wheel. It is composed of a fork barrel, a fork shoulder, etc., except for a few exceptions such as the famous “left-hander”, there are generally two fork barrels. In addition, the shock-absorbing front fork generally has a fork bridge. An important parameter of the front fork is its offset, see the figure below.

  1. Hard Fork | (Rigid) Fork

Hard forks, that is, front forks without a shock absorber structure, are more common on road bikes and folding bikes. In addition, some “mountain horses” will also change the front forks of mountain bikes to hard forks.

  1. Suspension Fork | Suspension Fork

Suspension front fork, mostly used on mountain bikes. In addition to the common fork shock absorbers (picture 1 below), there are also various types of shock absorbers such as Head Shock (picture 2 below).

  1. Oil Spring Fork | Coil (Sprung) Fork

The rebound medium is a front fork with a coil spring. The advantage is reliability and linear performance of rebound, the disadvantage is weight.

  1. Air Fork | Air (Sprung) Fork

Front forks whose rebound medium is compressed air. The advantage is weight, but the linearity of stability and rebound is not as good as a similarly priced oil-sprung fork. For example, my car in the cover photo uses an entry-level Diaosi air fork – the famous “God Fork”.

  1. Fork Shoulders | Crown

The fork crown is the part used to connect the two fork barrels of the front fork. Some suspension forks may feature double crowns for added strength.

  1. Fork Bridge | Fork Brace/Bridge

The fork bridge is generally used on the suspension front fork to connect the outer cylinder of the front fork, and the fork shoulder is used to connect the inner cylinder of the front fork, thereby strengthening the strength of the front fork. Note the difference with the “double fork shoulder” structure, the double fork shoulder is a design with two fork shoulders, and the fork bridge and the fork shoulder are different. The inverted fork cannot be provided with a fork bridge due to its structure, so a barrel axle is generally used. Hard forks generally do not need a fork bridge because they do not have a rebound mechanism.

  1. Fork Barrel | Fork Blade

The general front fork has two fork barrels. For the shock-absorbing front fork, the left one is generally responsible for damping, and the right one is responsible for rebound. The front fork with the inner cylinder above the outer cylinder is the front fork, and the front fork with the inner cylinder under the outer cylinder is the front fork. Most suspension forks are positive forks. The photo below shows an upside-down front fork.

  1. Fork Riser | Steerer Tube

The front fork riser is the metal tube above the fork shoulder, which extends into the frame head tube, and the stem and other equipment are fixed above. Since cutting the riser tube and smashing the sling is time-consuming, laborious and irreversible, and the mismatched riser tube diameter and head tube diameter cannot be installed, riders generally pay great attention to the diameter and length of the riser tube when purchasing a front fork.

  1. Rebound | Oscillation

The main function of the shock-absorbing front fork is to absorb vibration, which requires a structure that can absorb shock and then return to its original state. This is achieved by the rebound structure of the front fork. As mentioned above, it can be divided into spring, Rebound media such as air.

  1. Damping | Damping

Just as important as rebound is damping. Without damping, the fork will keep vibrating back and forth; if the damping is too strong, it is likely that the fork will not reset by the time the next shock occurs. Damping is generally achieved by hydraulic devices, that is, two cylinders fixed on the inner cylinder and one piston fixed on the outer cylinder (to be precise, the piston divides a cylinder into two parts). The compression or rebound of the front fork drives the movement of the piston, which presses the damping oil in the lower cylinder into or out of the upper cylinder. When the damping oil moves between the two cylinders, it needs to pass through a narrow passage, which restricts its flow rate, thereby providing damping. The picture below is a screenshot of the video when I changed the damping oil of the front fork. What I hold in my hand is the mechanism that provides damping in the fork barrel. I also recommend that you do not change the oil outside…

  1. Lockout Fork | Lockout Fork

A fork with a lockout function that locks out the fork’s rebound function, making it a hard fork, which is especially useful on uphill sections. In addition, some mid-to-high-end forks also feature segment lockout, which limits rebound travel. According to the different locking principles, it can be divided into mechanical locking and hydraulic locking.

  1. Mechanical Lockout | Mechanical Lockout

Mechanical locking is a structure in which the inner and outer tubes are rigidly connected by a mechanical device, thereby realizing the locking structure.

  1. Hydraulic Lockout | Hydraulic Lockout

Hydraulic locking is a structure in which the locking is achieved by closing the oil circuit in the damping tube.

  1. Rear shock | Rear Shock/Suspension

The rear shock is the rear shock absorber of a soft tail bike. Because I have less contact with it, I can’t go into details. If you want to know more about it, you can go to [Original] Basic and Advanced Principles of Bicycle Rear Suspension (1) – Rear The basic knowledge of the bile, the structure of the rear shock is a little more refined than the front fork, but the basic principle is the same. However, for those who are just getting started, I should point out that the “front and rear double shock absorber” car that can be bought for five or six hundred on the street has a shock absorber structure that fools Xiaobai. Shakes can’t even be called.

  1. Preload | Preload

Domestic riders generally call preload Sag, but in fact Sag refers to the amount of sinking, and the accurate name of preload should be Preload. When riders get on the bike, they will compress the front fork due to their own weight. This distance is called the sinking amount. Increasing the spring preload can reduce the sag, and reducing the spring preload can increase the sag. The amount of subsidence is not as small as possible. The appropriate amount of subsidence can ensure that the wheel and the ground are always in good contact.

  1. Brake / Brake | Brake

Good braking is essential to a bicycle. Here are some common braking methods.

  1. ​​Rod Brake | Rod-Actuated Brake/Rod Brake

I don’t actually know what the exact name of this type of braking is – maybe “link braking”? Riders who have ridden the second and eighth should be no stranger to this braking method.

  1. V Brake | V-Brake/Linear-Pull Brake/Direct-Pull Brake

One of the most widely used braking structures at present is actually a flat-pull derivative version of the suspension brake. Because of its simple structure, stability and reliability, and strong braking force, it is widely used in folding bikes and mountain bikes. The disadvantage is that the muddy water on the rim will affect the braking ability, so in the field of mountain bikes, disc brakes tend to gradually replace V brakes. By the way, those metal elbows at the end of the conduit are called Noodles.

  1. Hanging brake | Cantilever Brake

The suspension brake is a form of braking that has been widely used. The brake arms on both sides are pulled by the middle cable to rotate and clamp the rim to generate braking force. This form of braking does not cooperate with the shock absorber structure very well, so it has been gradually phased out.

  1. Caliper Brake | Side-Pull Caliper Brake

The caliper brake is one of the other widely used braking structures. The simplified version of the caliper brake is used on ordinary street cars. The performance is – er – almost zero, but the professional caliper brake used on road cars Performance is awesome. The advantage of the caliper brake is that it is small in size and light in weight, but the disadvantage is that it cannot adapt to wider tires. In addition, if the maintenance is not good, it is easy to have the problem of rotating on one side and not moving on the other side. Similar problems may occur with V-brakes, but the preload of the brake arm springs on both sides of the V-brake can be adjusted separately, while the caliper brakes are relatively troublesome to adjust. In addition, the caliper brake can be divided into uniaxial (Single Pivot) and Dual Pivot versions, as shown in the picture below, I added a few circles on the basis of the original picture to make it more obvious. The caliper brakes used on road bikes today are basically two-axle versions.

  1. Drum Brake

The four braking methods described above: link brake, suspension brake, V brake and caliper brake are all rim brakes (Rim Brake), as opposed to hub brakes (Hub Brake), including drum brakes, Holding brakes, disc brakes, reverse brakes, etc. Except for disc brakes, all hub brakes require a metal plate connected to the frame, called the Reaction Arm, otherwise there is a risk of loosening the nut used to hold the wheel set under the action of the braking force. The silver-white metal plate in the picture below is the Reaction Arm used for coasting. If you look at the rear wheel of your scooter with a brake, you can find the same metal sheet, but it is usually integrated with the cable support structure required for braking.

Drum brake is one of the common forms of hub brakes, with cable actuation and link actuation. The picture below is the drum brake actuated by the cable. Note that the black metal sheet is the Reaction Arm. Like the drum brake of a car, poor heat dissipation is the main problem of the drum brake.

  1. Brake | Band Brake

This form of braking applied to the rear wheels of most scooters in China first appeared in 1884. Inside this structure is an elastic arc-shaped belt, one end is fixed to the shell, the other end is connected to the pull wire, and the inside of the belt is a metal disc connected to the hub. When the cable is pulled, the cable pulls on the strap, causing the strap to contact and rub against the disc, thereby providing braking force. This type of braking has low cost and simple structure, so it is widely used in scooters in China, but its braking force is very limited, especially after aging or wet. In addition, there is also the problem of poor heat dissipation. There may also be unwanted contact with the middle brake disc when not braking. In addition, I have also encountered many cases where the straps broke due to aging, which basically did not provide any braking power.

  1. Disc Brake | Disc Brake

Disc brakes have been applied to more and more bicycles. At present, the disc brakes used in road bikes have also passed the UCI certification. It is estimated that major manufacturers will aggressively attack the field of road bikes. As a form of hub braking, disc brakes can overcome the defect of insufficient braking force under harsh conditions of rim braking; at the same time, compared with other hub braking methods such as drum brakes and holding brakes, the exposed disc can provide good heat dissipation; and, because the disc brake calipers are fixed to the frame, disc brakes are the only hub braking method that does not require a Reaction Arm.

Fox 32 RL Federgabel mit 100 mm Federweg
  1. Oil Disc/Hydraulic Disc Brake/Hydraulic Disc Brake | Hydraulic Disc Brake

The oil disc is a disc brake that is hydraulically driven to hold the disc. The brake lever drive piston creates pressure in the brake fluid, which then drives the piston in the caliper, pushing to move the pads. According to the number of pistons in the caliper, it can be divided into single-piston, double-piston, multi-piston, etc., just like the disc brake of the car. Most entry-level oil discs are two-piston opposed (that is, two pistons, one on each side of the disc); by the way, most family car disc brakes are single-piston (also That is, there is only one piston on one side of the brake disc, the brake pad on the other side is fixed, and the caliper is floating as a whole, and the piston squeezes the brake disc to the fixed side. The fixed pads also make contact with the disc, a design known as Floating Calipers). Some bicycle oil discs will have an opposed four-piston design, but due to the lighter weight of the bike, it doesn’t require a lot of braking force to stop, and the amount of braking force ultimately depends on the grip of the fingers, not like a motor vehicle. Brake pump, so I have reservations about the performance boost that comes with increasing the number of pistons.

  1. Line Disc/Line Pull Disc Brake/Mechanical Disc Brake | Mechanical Disc Brake

The wire disc is a disc brake that is driven by a wire to make the disc clamp the disc. The general principle is that the wire drives a rotating part to rotate, and then the rotating part converts the rotary motion to the horizontal movement of the disc through the thread. The picture below is my first car, which uses the famous BB5 wire disc, which is a single-action disc brake. Please ignore the fenders on your car.

  1. Single-Action Disc Brake | Single-Action Disc Brake

Most entry-level line discs are single-acting, just like the disc brakes for family cars described above, but unlike the floating caliper design used in most family cars, single-bike disc brakes generally use floating discs. The design is that only one side of the pad can move, the other side is fixed, the moving pad pushes the disc to the fixed side, and finally both sides of the disc are in contact with the pad. By the way, according to personal experience, in the case of ensuring sufficient clearance, making the disc relatively closer to the moving pad side can achieve a slightly better braking feel.

  1. Dual-Action Disc Brake | Dual-Action Disc Brake

Most oil discs and a small number of line discs are double-acting, that is, the pads on both sides can move.

  1. To the film | Disc Brake Pad

The pad is the transliteration of Lining. Lining actually refers to the part that is in contact with the disc when braking. Usually, people use Pad instead of Lining to command the pad.

  1. Floating (Disc) Brake Rotor

OK, the single-action disc brake is introduced above. Although from the mechanical design point of view, this is a floating disc (Floating Rotor) design, but the floating disc mentioned by the riders is a completely different matter. The floating disc mentioned by riders is actually a two-piece brake disc, that is, the part used for friction and the part used for fixing are separated, and the middle is fixed by screws. Discs that do not use this design method are generally not called “floating discs” regardless of whether they are “floating” during actual braking; otherwise, they are generally referred to as “floating discs”. The benefits of this two-piece design are reduced disc flex during braking, a lighter material in the middle, and supposedly better heat dissipation.

  1. Coaster Brake

This kind of braking method, which is widely criticized by riders, is generally used in “magic cars”, but in fact my Cruiser also adopts this braking method. In fact, my personal opinion on the “magic car” is that the magic car itself is not something worthy of criticism, but some businesses use this to fool the little white riders, making them think they are riding a very powerful car, and at the same time some The riders have been fooled and started to pretend to be literary and artistic, which is not good. Well, close to the subject, we generally think this is one of the most brutal braking methods, not because of how efficient the braking mechanism is, but because this thing is pedaled with your feet, think about the force you put on the pedals with your feet , or the force squeezed by the hand on the brake handle is large, so this thing can easily lock the rear wheel, so many people will think that this braking method is not safe enough. The coast brake is actually a derivative form of the drum brake. The advantage is that the braking force is large, it is not disturbed by rain and dust, and generally does not need maintenance; It can provide a large braking force when it is horizontal, so it is not very convenient in some cases. In addition, when the chain breaks, all braking force will be lost. Of course, there is also the problem of poor heat dissipation.

  1. Frame | Bike Frame

The frame is the skeleton of the bicycle, which is made of molybdenum-chromium steel, aluminum alloy, titanium alloy, carbon fiber and other materials. A good frame is an important part of a good bike, and when I save a bike, I usually allocate 1/3 of my budget to the frame.

  1. Riser | Seat Tube

The seat tube is the part of the frame that supports the seat tube. The seat tube size you choose when building a car needs to match the seat tube size.

  1. Head Tube | Head Tube

The head tube is the part of the frame that supports the front fork. The size of the fork seat tube selected when building a car needs to match the size of the head tube.

  1. Top Tube | Top Tube

The top tube is the upper part of the front triangle of the frame.

  1. Down Tube | Down Tube

The down tube is the lower part of the front triangle of the frame, and it is the most stressed part of the frame.

  1. Flat Fork | Chain Stay

The flat fork is the horizontal part of the rear triangle of the frame.

  1. Vertical Fork | Seat Stay

The vertical fork is the inclined part in the rear triangle of the frame.

  1. Flat Fork | Drop Out

The flat fork link is a component that connects the flat fork and the vertical fork, and also provides the installation position of the rear wheel. The English name is drop out. Pay attention to the place where the end of the front fork connects to the front wheel, which is called the fork end. Some people think that it can also be called drop out, and some people think that fork end and drop out should not be confused.

  1. Tail hook | Derailleur Hanger

The tail hook is a component connected to the flat fork tab for fixing the tail hook. Most frames require a rear derailleur to attach to the derailleur, but some frames directly integrate the rear derailleur mounting location. The part circled by the yellow circle in the picture below is the tail hook.

  1. Five-way | Bottom Bracket Shell

The bottom bracket is where the bottom bracket is used to mount the bottom bracket. Why is it called five links? Because if we can see the inside of this part, we can see that it communicates with the down tube, the riser, and the two forks. Wait…is there another one? The five links themselves are also connected! Therefore, this location for mounting the bottom bracket is called the “Bracket”.

  1. Center axis/BB | Bottom Bracket

I think the abbreviation BB should be one of the most referable content (fog). When riders talk about BB, they refer to Bottom Bracket, or the center axle. The two classification methods of the central axis are described below. One is divided into built-in (press-in) and external center shaft. The built-in bottom bracket is an assembly containing connecting rods and bearings, which are integrally pressed into the bottom bracket, and then the crank is connected to both ends of the connecting rod of the bottom bracket. After installation, only the bottom bracket can be observed from the outside, and the inner shaft cannot be observed. The external center shaft is a hollow cylinder with bearing components at both ends, which is screwed to the outer two sides of the bottom bracket, and the crank and connecting rod are fixed together. To install, thread the connecting rod through the hollow bottom bracket and install the other crank on the other side. After installation, the bearing shell with the exposed central axis can generally be seen from the outside. In the following two pictures, the top two are the built-in center axis and the installed effect, and the bottom two are the external center axis and the installed effect.

Another classification method is according to whether the connecting rod (spindle) (I don’t know if it is “connecting rod” in Chinese, spindle itself means “spindle”) and whether the crank can be disassembled, divided into three-piece and one-piece central axle . The three-piece central shaft can be divided into cotter pin central shaft, square hole central shaft, spline central shaft, etc. according to the interface form, which will be introduced in detail below. Three-piece bottom brackets are generally used for built-in bottom brackets. The one-piece central axis has the form of an external one-piece central axis (“one-piece central axis” in a narrow sense, the following one-piece central axis refers to this one-piece central axis) and Thompson-style central axis. Although the Thompson-style central axis is an integrated type, but I think it should belong to the built-in bottom bracket. In addition, there is the wonderful Ultra-Torque of Campagnolo’s family. Is that one integrated…

  1. Cottered Crank Bottom Bracket

The split pin central axle is to punch two holes in the diameter direction at both ends of the connecting rod, and there are corresponding holes on the crank, and then use a pin to pass through the holes on the connecting rod and the crank to connect the connecting rod and the crank. fixed. This interface method is very uncommon these days, and most of the previous 28 bars used this interface.

  1. Square hole central axis | Square Taper/Cotterless Bottom Bracket

The shape of both ends of the connecting rod of the square hole central shaft is square, and correspondingly, the opening on the crank is also square. One thing to note is that the square opening angle of different cranks may differ by 45 degrees, and I have been pitted by this…

  1. Splined Bottom Bracket | Octalink/Splined Bottom Bracket

Both ends of the connecting rod of the splined center shaft are splined, so theoretically they can provide better force transmission than the square hole center shaft.

  1. One-piece central axis | X-Pipe Bottom Bracket

This form of connecting rod is connected to the crank on the side of the chainring and is fixed through the hollow center shaft. X in English stands for Cross, because X looks like a cross-shaped fork. Similarly, XC stands for Cross Country, X-ing stands for Crossing (sidewalk)…

  1. Thompson Bottom Bracket

This form of bottom bracket is mostly used on BMX and Cruiser, because my scooter happens to be a Cruiser, so I have tossed this form of bottom bracket. The cranks on both sides and the connecting rod in the middle are a complete S-shaped metal rod, which is fixed on the bottom bracket with bearings. Because it is necessary to ensure that the S-shaped metal rod can be taken out from the bottom bracket, the size of the entire bottom bracket is very large (a few millimeters), and the parts are very difficult to find… However, it seems that some honest bicycles also have Thompson-style bottom brackets with openings pin interface is used.

  1. Seatpost | Seatpost

The seat tube is the metal tube under the seat, strictly speaking, the seat bag is not included. The size of the seat tube needs to match the size of the frame seat tube. By the way, let’s take a look at the pump that Dahang integrates into the seat tube, which is very practical!

  1. Saddle / Saddle Bag | Saddle

Many people complain that the sports bike seat has no shock absorption. I also admit that every time I come back from the bike and sit on my Cruiser, I feel that it is very comfortable~ However, the purpose of sports bikes is to exercise, so all weight gain needs to be removed. It’s a no-brainer structure that can cause unnecessary blow-off, so it’s natural to have no shocks, and wanting a shock-absorbing seat is like wanting a Sparco or Recaro sports seat with sofa cushions and seat heating/ventilation Same.

  1. Seatpost Clamp | Seatpost Clamp

A seatpost clamp is a quick release device on the seatpost that clamps the seatpost. To save weight (I’m not sure…) many Pros use non-quick-release seatpost clips on road bikes that don’t adjust the seat height very often.

  1. Headset | Headset

The headset is the bearing located between the front fork riser and the frame, and is also divided into bearing and bead block structures. When saving a car, it is best to match the headset when buying a frame. I have bought a frame that costs hundreds of thousands of dollars. If you ask the boss, you will probably get a headset.

  1. Brake Handle | Brake Lever

This should not need to be explained… A good brake handle will feel much stronger than ordinary brake handles, and the 5-15 yuan pair of brake handles on street cars can’t be squeezed…

  1. Stem | Stem

The stem is fixed to the top of the front fork riser to connect the handlebar. Several important parameters of the stem are shown in the figure below.

  1. Handlebar | Handlebar

Handlebars provide hand grip (I really don’t know how to explain such an obvious concept…). There are common claw handlebars for road bikes (is it called this, or claw handlebars refer to the rest handle of the triathlon… I don’t have much contact with road bikes, so I’m not very sure), straight handlebars and swallow handlebars for mountain bikes, and Butterfly handle of station wagon, etc.

  1. Grip | Handlebar Grip

The rubber or sponge cover wraps the parts held by both ends of the straight handle and the swallow handle. (The local tyrants can’t do anything with leather…)

  1. Handlebar Tape/(Grip) Band

The strap around the grip end of the horn handle.

  1. Vice Handle | Bar End

Except for long-distance mountain bike rides, don’t put a sidebar on your mountain bike, it’s ugly, heavy, useless, and unsafe. The vice handle can be used for a short rest when riding a long distance, but I personally feel that it is not very useful.

  1. Wheelset | Wheelset

The wheel set is a whole composed of tires, rims, spokes, and hubs.

  1. Rim | Rim

The rim is a metal frame used to fix the tire. The rims of mountain bikes are generally double-layer aluminum alloys, with disc brake rims and V brake rims. V-brake rims can also use disc brakes with disc brake hubs, and disc brake rims can never be used with V-brakes. The rims of road bikes include aluminum knives, carbon knives, and aluminum edge carbon knives. Carbon knives are one of the most luxurious consumables in a bicycle rim, because they are all made of carbon fiber.

  1. Spoke | Spoke

Spokes are the metal strips that connect the rim to the hub and are generally made of steel. Depending on the hubs used, the spokes have straight (not to be confused with straight-pull) elbows. Although the straight spokes look more dazzling and more vigorous in publicity, most of the Pros still use them in actual competitions. Traditional elbow spokes. In addition, there are variable-diameter spokes, wind-breaking spokes, etc., which will not be described in detail here. To repeat a basic knowledge, the spokes bear tension, not pressure.

  1. Cap | Nipples

Bar caps are metal caps that attach the spokes to the rim. When searching, it is recommended that you search for bike nipples, not just nipples… um… let’s talk about this… I understand everything…

  1. Hub | Hub

Searching for “hub”, the result of the picture is probably like this…you should know which hub I am referring to. The bearing of the hub is divided into two structures: the bearing and the ball stop. The bearing is actually a packaged ball bearing, which can be directly inserted into the hub during assembly, while the ball stop structure requires balls to be assembled. Bearing structure is generally used for medium and high-end bearings, and bead block structure is used from street bikes to very high-end bicycles. For example, SHIMANO hubs are famous for only using bead block structure. For a detailed comparison of the two, see Why do bicycles not use ordinary ball bearings?

  1. Tire | Tire

The tires of most bicycles are composed of inner tubes and outer tires, and tubeless tires are described below. There are two types of structures inside the tire sidewall: steel wire and nylon. The tire pattern is directional. Looking from top to bottom, the pattern generally points forward. Obsessive-compulsive disorder is like me, and I feel all kinds of discomfort when I see the wrong tire. The size identification of a mountain bike tire is the rim diameter × tire width, such as 26×1.95, which means that the tire should be used on a rim with a diameter of 26 inches, and the width after inflation is 1.95 inches. When encountering a width expressed as a fraction, it should be noted that 26×1 3/8 and 26×1.375 are not the same size and cannot be used in common. Road tire size is also expressed by rim diameter and tire width, but the units are different. For example, 700×25c means that the rim diameter is 700C (actual diameter is 622 mm), and the inflated width is 25 mm. For tire size, see Tire Sizing Systems.

  1. Inner Tube | (Inner) Tube

When the inner tube is inflated, it bears the weight transferred by the rim. The size of the inner tube needs to be the same as the size of the outer tire.

  1. Tubular | Tubular/Tub/Sew-up/Single Tire

A tubular tire is essentially a sealed rubber tube that is glued to the rim. Due to the difficulty of repairing tubular tires, they are rarely used today. However, because the risk of puncture in the track race is low, and carbon knives are more suitable for matching with tubular tires, tubular tires are still widely used in the above two occasions.

  1. Tubeless Tire | Tubeless Tire

Like the tubeless tire of a car, the tubeless tire used in a bicycle is a tubeless design and needs to be matched with the corresponding wheel set. Tubeless tires are favored in the mountain bike field because they allow lower tire pressure and can fill with fluid to prevent the air pressure from dropping too low after a puncture. Because the weight of self-rehydration is basically equivalent to the weight of an inner tube, tubeless tires are not widely used in the field of road vehicles that pursue lightweight. For the use of tubeless and tubular tires on road bikes, see Why don’t road bikes use tubeless? – bike.

  1. Self-rehydration | (Tubeless Tire) Latex

When the tire rotates, the self-rehydrating fluid will form a film on the inner wall of the tire. When the tire is punctured, the air flow will drive the self-rehydrating fluid to fill the small holes and solidify, thereby preventing the tire pressure from being further reduced.

  1. Tire Patch | Tire Patch

A tire patch is a piece of rubber used to repair tires. Students in Meidi can search for Tire Repair Kit if necessary, which includes a complete set of equipment such as tire patch and glue.

  1. Valve | Valve

Valve means “valve”, the valve on the bicycle is naturally the valve~

  1. English Mouth | Dunlop/Woods/English Valve

Yingzui is the type of valve used on relatively old-fashioned bicycles, which is the kind of valve core.

  1. Beautiful Mouth | Schrader/American Valve

The valve form used by most street and mountain bikes today.

  1. French Valve | Presta/Sclaverand/French Valve

The valve type used by most road bikes.

  1. Air Pump | Air Pump

A gas cylinder…well, it’s essentially a kind of gas pump~

  1. Quick Release | Fast Release Wheel

Quick release is actually a structure, so it is slightly inappropriate to translate it into Fast Release Wheel. Fast Release Wheel refers to a wheel set with a quick release structure. Of course, the quick release seatpost clamp is the Fast Release Seatpost Clamp, and that’s all.

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Stevenford, the General Manager of ALA CYCLES, professional on the MTB,E scooters bike, cargo bikes for more than 15 years tll now.

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