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Fork tube diameter




  • €14.00 - €129.00

  • €14.00 - €129.00

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The fork of a bicycle is one of the components that contribute to its stability and the responsiveness of its steering.

Function of a bicycle fork:

The fork of a bicycle is fixed to the frame via a headset, it holds the front wheel, the stem and the disc or pad caliper braking system. It can be straight for lively steering or slightly curved for more stability. A bicycle fork can be suspended to absorb the irregularities of the road and improve comfort or a rigid fork in which case it will be lighter and the steering more manageable and precise.

Choosing a bike fork:

A bicycle fork should be chosen based on the component interfaces it must hold:

The bicycle fork steerer:

The diameter of the fork tube must be compatible with that of the head tube and with the headset, it can be threaded for a screw-in headset or smooth for a headset headset. Standard pivot diameters are 22.2mm, 25.4mm (threaded tube) and 28.6 (smooth tube)


The bicycle fork is designed for a given wheel diameter, for city or electric bikes the standard wheel diameters are 700, 29, 28, 27.5 or 26 inches, junior or children's bikes can have wheels of 12 , 16, 20 or 24 inches. The diameter and type of attachment of the wheel hub axle must also match the intended locking of the wheel.

The braking system:

It can be by hydraulically controlled disc or by cable in this case the caliper is fixed by 2 screws on one of the fork sleeves, the second braking system can be by a brake caliper fitted with rim pads, in this assembly the fixing is done through a hole in the fork under the pivot.

The technologies of a telescopic bicycle fork:

Entry-level models generally consist of elastomeric buffers or springs to absorb shocks, they can be adjustable in preload to adapt to the weight of the cyclist. The mid-range and high-end models can be lockable for road use, compression via adjustable air chamber and relaxation via adjustable oil cartridge.

Care, maintenance and adjustment of a bicycle fork:

It is necessary to regularly clean and inspect the fork of your bicycle in order to maintain its integrity, functionality and performance for as long as possible. The presence of mud or dried earth on the joints can reduce their lifespan and even cause them to crack.

We recommend a periodic check of the tightening torques of all screwed elements and a visual check of the tappings and threads.

The appearance of scratches on a telescopic fork stanchion may indicate severe wear.

Adjusting the compression and rebound of a shock absorber fork model after each ride will maintain its travel, performance, comfort and efficiency.

Why choose a used bicycle fork?

The fork of a bicycle is an expensive component which is regularly subject to technical developments by manufacturers so that it is compatible with new headset, brake or wheel diameter standards.

If your bike is more than 3 years old, it is possible that the model and brand of the fork on your bike is no longer manufactured, it then becomes very difficult to identify a compatible equivalent because the standards for fixing the brake, the stem, wheel headset or brake have probably evolved.

Second-hand bicycle forks can be a very good economical alternative because their cost can be up to 80 percent of their new equivalents and ecological because the reuse of second-hand parts helps reduce waste and pollution.

What are the most famous brands of bicycle forks?

The manufacturers offering the largest number of models and the widest range of technologies are Rock Shox, RST, Suntour, Zoom, Manitou, etc.