BikeFit system's leg length shims will correct any leg length discrepancies or hip imbalances.
If you are reading this you must be aware of some issues with your bike fit, or you have had a professional bike fitting in the past and they have recommended leg length shims.
In which case you may have experienced:
If you have any of the problems above, then of course we suggest having a bike fit first, but if not, then leg length shims could be the answer.
BikeFit leg length shims have been know to solve a combination of the above issues.
Leg Length Shims (LL Shims) are used to compensate for leg length discrepancies (one leg is shorter than the other). BikeFit's 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, BikeFit recommend stacking two 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.
There are 4 types of shims designed for different types of shoes. Please click below if you need an alternative option:
Let's start by saying that leg length shims should be prescribed by a bike fitter. However, if you prefer to experiment based on others recommendations, then look for the following signs.
Ask your partner or friend to hold your ankles together while you lie flat on the floor. Ask them if your ankles are aligned or is one high than the other. Then sit up, and see if they are still misaligned? If so, a bike fit leg length shim could be right for you.
If you have lower than 1.5 cm difference between your legs use 1 shim, use two if above 1.5 cm difference, stop if you think you need more than 2 x 3 mm shims and immediately seek a bike fit.
If you have a turbo trainer, place a mirror straight ahead and watch your knees. Visualise the movement of your knees. If they drop into the bike at the bottom of the stroke, then bike fit cleat wedges may be right for you.