Do you have a bike with a short head tube

2mm rotors

consistent feel during cornering

a rubber shim and an X-Lock composite mounting bracket

Who's this item for: Any riders after a lightweight 12-speed cassette with excellent shifting performance

SuperB Derailleur Hanger Alignment Gauge Tool Needs Images Do you have a bikeA misaligned hanger is often the main culprit behind poor shifting and a tweaked hanger will make it impossible to get your drivetrain running smoothly in every gear. All it takes is a bit of a knock from a rock or log, putting your bike down the wrong way, or a crash, and suddenly your gears are all over the place. The worst thing is that the hanger often looks fine but can be juuust wonky enough to make your gears skip a little and drive you insane.