For the new Shimano series. Oversized Pulleywheels from CeramicSpeed

The OSPW System for Shimano 9200 and 8100 is an industry leading product, chosen by many of the world's leading cycling teams and professional triathlete's.

Featuring a 13-tooth upper pulley wheel and a 19-tooth lower pulley wheel to provide absolute optimisation of the rear derailleur. The upper and lower oversized aluminium pulley wheels come fitted with either standard or coated CeramicSpeed Bearings.