Why are BikeFit’s 3-hole Leg Length Shims (LLS) longer and protrude out more than other brands? The additional length is by design.
Cleats are designed to be used on the bottom of a cyclIng shoe (directly in contact with the sole). Take the cleat away from the surface (sole) and it will no longer work as it was designed. Adding length to the front of the LLS is like adding shoe surface to assure the cleat/pedal interface will function properly.
Engagement problems may begin to occur when building up a 3-hole road cleat to as little as 3-4mm in height. Of course, the greater the stack height, the more likely an engagement issue will arise. The front of the cleat may dip into the pedal too far causing a delay or even the inability to clip into the pedal.
Same Size Leg Length Shims = Dangerous
BikeFit Protruding Leg Length Shims
Take a look at 2 more examples below of the size differences between BikeFit’s LLS vs. others.
The engagement problems may not occur every time you attempt to clip into the pedal, but it will eventually happen! It only takes one mishap at an inopportune time to cause significant concern. If you are looking for Leg Length Shim Saftey, BikeFit provides you with the best comfort and options.