FORM Universal Leg Length Shim – 3-hole Modular

(2 customer reviews)


Brand: Form

Universal 3-hole Leg length Shims allow riders with leg length discrepancies to reduce discomfort and enjoy a more natural, uninhibited cycling experience.

In stock

SKU: 2231 Categories: , Tags: ,
GTIN: 731716552735
Brand: Form


FORM Universal Leg Length Shims are an innovative 21st century design made specifically for cyclists who need to compensate for leg length discrepancies.


  • Creates a more equal leg extension
  • Stabilizes the pelvis
  • Establishes a smoother and more controlled pedal stroke on the shorter side
  • Reduces pain and discomfort


  • A curved shape to facilitate easy fitment to the shoe
  • A chamfered front end to enable easy clip-ins, particularly when shims are stacked
  • A “pinning” system to connect multiple shims or FORM cleat wedges together
    • small pins which are inserted through holes to connect the units
  • Cleat position markers to help with cleat alignment on the shim
  • Made from impact resistant nylon to reduce damage due to repeated clip-ins
  • Can be combined with FORM Cleat Wedges easily to optimize individual comfort
  • Constructed from a tough, impact resistant nylon, the shim is protected against scuffing and hard impacts

Leg Length Shim Usage Criteria

Leg length shims are used to increase the effective leg length of a shorter leg in cases where a cyclist suffers from a leg length discrepancy. Signs of a discrepancy can be:

  • Overreaching on one side at the bottom of the pedal stroke
  • Pelvis tilted or rider leaning to one side of the saddle to retain connection with the pedals (many times this is apparent in saddle wear on one side more than the other)
  • One leg feeling under-extended whilst the other feels just right

Assuming a rider has been assessed to have a discrepancy, the issues above could be solved with the use of leg length shims.  Leg length shims are also sometimes described as lifts or adding “lift.”

Universal 3-hole Cleat Shim Compatibility

Universal 3-hole Leg Length Shims are compatible with all 3-holed cleats including:

  • Shimano SPD-SL
  • Look style 3-hole
  • Time/Mavic

What’s in the Box?

  • 1 x 2mm shim
  • 1 x 3mm shim
  • 6mm and 10mm pins for connecting shims or cleat wedges
  • Longer screws

Additional information

Weight0.1 lbs
Dimensions6 × 3 × 1 in

2 reviews for FORM Universal Leg Length Shim – 3-hole Modular

1-2 of 2 reviews
  1. Verified reviewVerified review - view originalExternal link

    Well designed, nice clean install, and longer 3 mil hex screws included. Would prefer 4 mil for better “snugging” but with care, the 3s work.

    (1) (0)
    • Todd you will be pleased to know that there has been a change to 4mm heads on all screws, but some of the older inventory still has 3mm head screws in the packs.

  2. Verified reviewVerified review - view originalExternal link

    Great product! More thoughtfully designed than other shims I’ve used in the past, with pins to hold them together to keep from slipping. Also, both Fit Kit Systems’ and Form’s customer service and sales personnel have been super helpful and responsive in the past, so it’s a double win purchasing these products!

    (0) (0)

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