Jtek Eccentric Front Mech Shim 28.6 to 34.9

Designed for fitting a 34.9mm front mech on a 28.6mm frame allowing adjustment outside of the mech’s normal range front to back and/or in and out, ie moving the effective range of the cage nearer the frame or further out.

Made from plastic flexible enough to open to 29mm and snap around the down tube.