Leg length shim - MTB walkable

Leg length shim - MTB walkable

from 14.00

FORM’s patent pending MTB shims are the only “walkable” SPD shim available, and were developed specifically to overcome the issues inherent in traditional MTB shim designs, those being;

- a difficulty when walking or clipping in

-a wobbly and unstable connection to the pedals

Design By Form’s product solves these issues by using:

- 4 tread areas to protect the cleat and add clipped in stability

- chamfered front feet which facilitate easy cleat engagement

- two sets of posts/tabs which protrude into the shoe to resist rotation

These shims are ideal for gravel, cyclocross or cross country MTB riding where a relatively high amount of time is spent in seated pedalling, and are best suited to traditional stiff MTB shoes.

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:

a) overreaching on one side at the bottom of the pedal stroke

b) pelvis tilted or rider leaning to one side of the saddle to retain connection with the pedals

c) 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. Shimming will create a more equal leg extension, stabilise the pelvis and lead to a smoother and more controlled pedal stroke.

*PLEASE NOTE THIS SHIM IS OPTIMISED FOR SHIMANO SPD. USAGE WITH OTHER TYPES OF MTB CLEATS MAY PRODUCE VARYING RESULTS.

*PRODUCT WORKS BEST ON TRADITIONAL, STIFF-SOLED MTB SHOES.

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FITTING INSTRUCTIONS


Stack options:

  • the base unit (black rubber piece & grey centrepiece) provides 3.5mm of stack

  • the base unit plus the 2mm additional shim provides a total of 5.5mm of stack

  • use just the base unit for 3-4mm of correction, and the base unit plus spacer for 5-6mm of correction

Positioning:

  • the chamfered/curved feet face forward / triangular feet rearward (logo at rear)

  • the long posts on the centrepiece can be positioned in either the front or rear matching holes found in the base

    unit, depending on cleat positioning

  • the posts should be inserted through the main body and into the unused set of bolt holes in the shoe (2x holes

    for cleat bolts / 2x holes for posts)

  • the two rectangular teeth should be inserted into the two slots in the base of the shoe

Tips:

  • use the 16mm screws for 3.5mm stack / use the 18mm screws for 5.5mm stack

  • tighten screws VERY TIGHT to prevent cleat or shim

  • the rear of the 2mm spacer can be trimmed to allow flush positioning on a show with a recessed cleat area