CeramicSpeed OSPW X Pulley Wheel System Shimano GRX/RX 2x11 - Coated Races Alloy Pulley Carbon Cage BLK ModelNumber=K1251 ASTM F1952-15 standards

ASTM F1952-15 standards

Intended use = Enduro/All-Mountain/Trail

this top rapidly transports moisture away from hotspots

Generous sidecut and modest tip rocker make for effortless turns in a range of conditions

CeramicSpeed OSPW X Pulley Wheel System Shimano GRX/RX 2x11 - Coated Races Alloy Pulley Carbon Cage BLK ModelNumber=K1251 ASTM F1952-15 standardsThe CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low friction bearings and unique overall design. Features 13 tooth upper and 19 tooth lower Cerakote coated aluminum pulley wheels with Grade 3 Silicon Nitride balls Robust cage crafted from polyamide and carbon fiber for durability and light weight Coated bearing races increase bearing service life by increasing