The Oversized Pulley Wheel System (OSPW System) offers increased drivetrain efficiency with two 17-tooth alloy pulley wheels and extremely low friction pulley bearings.
- Fits Model: R8000 SS , R8050 SS & GS , 9100 , 9150
- 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