HOME > PRODUCTS【FRAME】 WHEEL BOTTOM BRACKET GEAR HUB HEAD & FORK FRAME CHEMICALS STAND CHAIN TIRE TUBE BRAKE PEDAL WRENCH SCREWDRIVER HANDTOOLS OTHERS CASES > C-336 C-336GEAR HANGER ALIGNMENT GAUGE This gauge is for measuring and correcting the parallelism of the derailleur installing surface against the central surface of the fork. ※Only use this tool with the wheels installed on the frame. O.A.L. 450mm Weight 620g