Carbon fibre gearbox shim full set - 0.5mm, 1.0mm and 2.0mm (Associated B64 or B64D)
The Avid B64 Gearbox shims allow you to raise the gearbox to your desired height which ultimately provides more grip to that end. We developed these to provide you with the ability to save money by offering the popular 2mm version on its own, the fine tuning of the 0.5 / 1.0 shim separately, or the whole kit and caboodle for a great savings.