Alloy Handlebar Stem Shim/Reducer 1 1/8\\\'\\\' to 1\\\'\\\' (28.6mm
Set of 2 Pieces Ahead Handlebar Stem Shim. Alloy Handlebar Stem Shim/Reducer 1 1/8\\\'\\\' to 1\\\'\\\' (28.6mm. This adapter will allow you to fit a 28.6mm ahead style handlebar stem to a bike which has a 25.4mm threadless fork steerer. ).