BikeFit Leg Length Shims

If you experience consistent knee or hip pain on one side, or notice your hips rocking in the saddle while pedaling, you may have a functional or anatomical leg length discrepancy. It is best to consult with a professional bike fitter to confirm if a shim is the correct solution for your specific biomechanics.

These shims are specifically designed for two-hole mounting systems, commonly known as SPD-style cleats. If your road shoes use a three-hole system like Look or Shimano SPD-SL, these will not be compatible.

Yes, you can stack these shims to achieve a greater height adjustment. However, keep in mind that you will likely need longer cleat bolts to ensure the cleat remains securely attached to the shoe.

This shim is designed to be installed externally, sitting directly between the bottom of your cycling shoe and the cleat itself. This creates a stable, solid interface that maintains the integrity of your pedal connection.

Because the shim sits between the shoe and the cleat, it effectively moves the cleat 3mm further away from the shoe sole. While this doesn't change the engagement mechanism itself, it does alter your effective leg length, so you may need to slightly adjust your saddle height to compensate.