Product information "Spacer for 4-hole Rohloff brake discs | Thickness 0.5 - 1mm"
Compensating discs / disc shims for Rohloff brake discs for centering and aligning the brake disc to the brake caliper, available thicknesses: 0.5 / 1mm
Description Not all hubs are 100% standard. Compensating disks are included so that there is not so much underlay on the brake caliper because the brake disk is too far inside. Companies such as Riese & Müller and Schindelhauer Bikes use these shims on their bikes.
They are mounted between the hub and the brake disc and enable the disc to be centered exactly between the brake pads. In addition, annoying grinding noises are a thing of the past when using several impellers.