Converts a 68mm wide BB30 bottom bracket shell to an English BC 1.37� x 24T thread Necessary to use MegaExo, ISIS, and JIS bottom brackets in a BB30 frame 68mm BB30 ENG Alloy 52g
Adapts frames with oversized BB shells to work with standard GXP outboard BB`s Does not include GXP BB 68/73mm BB30 ENG Alloy w/o Tools 62g