Pinion spacer for the Shimano Ultegra CS-R8100 road bike cassette.

The replacement spacer ring type B is to be inserted between the sprockets with 14 and 15 teeth on both versions of the 12-speed cassette. The cassette with the 11-30 teeth gradation also uses a second spacer between the pinions with 15 and 16 teeth.

Mfr Claimed Weight
TBC