CeramicSpeed CeramicSpeed Shimano 9100/9150 Oversized Pulley Wheel System: Alloy Pulley, Carbon Cage, Black

The Oversized Pulley Wheel System (OSPW System) offers increased drivetrain efficiency with two 17-tooth alloy pulley wheels and extremely low friction pulley bearings.

Grade 3 Silicon Nitride balls
Hardened races
Reinforced polyamide cage and non-contact seals
Hand built in Denmark
Carbon fiber cage
Precision machined aluminum pulleys



Fits Brand: Shimano
Fits Model: R8000 SS , R8050 SS & GS , 9100 , 9150
Drivetrain Speeds: 11
Largest Cog: 32
Defined Color: Black