Leg length shim - MTB walkable - CUSTOM (kit)

Leg length shim - MTB walkable - CUSTOM (kit)

FORM’s patent pending MTB shims are the only “walkable” MTB shim on the market, and were developed specifically to overcome the issues inherent in traditional MTB shim designs, those being;

- a difficulty when walking or clipping in 

- a wobbly and unstable connection to the pedals

These shims are ideal for gravel, cyclocross or cross country MTB riding where a relatively high amount of time is spent in seated pedalling, and are best suited to traditional MTB, gravel, or touring shoes utilising an MTB style (2-hole) cleat.


Leg length shims are used to increase the effective leg length of a shorter leg in cases where a cyclist suffers from a leg length discrepancy. Signs of a discrepancy can be:

a) overreaching on one side at the bottom of the pedal stroke

b) pelvis tilted or rider leaning to one side of the saddle to retain connection with the pedals 

c) one leg feeling under-extended whilst the other feels just right

Assuming a rider has been assessed to have a discrepancy, the issues above could be solved with the use of leg length shims. Shimming will create a more equal leg extension, stabilise the pelvis and lead to a smoother and more controlled pedal stroke.

This custom shim option is available to those who have non standard requirements such as:

  • challenging shoe configurations
  • extra stack height requirements above 6mm
  • varus or valgus wedge requirements

IMPORTANT: Please do not order this product unless you have made contact with us to discuss your needs.

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