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Feature

OSPW System

Description

The Oversized Pulley Wheel System (OSPW System) offers increased drivetrain efficiency with two 17-tooth alloy pulley wheels and extremely low friction pulley bearings. Hardened racesCarbon fiber cageReinforced polyamide cage and non-contact sealsHand built in DenmarkGrade 3 Silicon Nitride balls28 tooth max compatabilityCompatible with 9100/9150 and 8000 series - exception being the R8000 GS