FORM Leg Length Shim 3-hole (SPD-SL, Time, Look)
The FORM modular leg length shim is compatible with all 3-hole road cleats. It includes a number of innovative and useful features:
Leg length shims are used to increase the effective leg length on a shorter leg in cases where a cyclist suffers from a leg length discrepancy. Signs of a discrepancy can be:
Assuming the rider's position is correct, and their legs have been assessed to have a discrepancy, the issues above could be solved with the use of leg length shims. Shimming, with the correct amount of rise, can create a more equal leg extension, stabilise the pelvis and lead to a smoother and more controlled pedal stroke on the shorter side.
Leg Lengt Shims are sold a piece.