CeramicSpeed Oversized Pulley Wheel System Coated Bearings Shimano 9100 - Limted Edition Blue
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Details
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