Leg Length Shims (LL Shims) are used to compensate for leg length discrepancies (one leg is shorter than the other). Our LL Shims are made of high-density plastic to conform to the curve of the sole of the shoe. The SPD, Universal and Look Keo LL Shims are 3 mm thick while Speedplay’s LL Shims are 3.5 mm thick.
For a 1 mm leg length discrepancy, we recommend “stacking” two (2) Cleat Wedges. To create a stack place two Cleat Wedges one on top of the other with the thicker edges of the wedges opposite each other