CeramicSpeed OSPW System, Compatible with Shimano 9100/8000, Coated - Black Disc Parts Manufacturer Part Number: ST4316K

Manufacturer Part Number: ST4316K

8mm mount to the stem clamp area of a drop bar

Manufacturer Part Number: 1506

KL6071 BR1120 13423

CeramicSpeed OSPW System, Compatible with Shimano 9100/8000, Coated - Black Disc Parts Manufacturer Part Number: ST4316KProven to be the fastest pulley system, chosen by many of the world's leading cycling teams and professional triathletes Optimized tooth designs offer 3 5 times longer life than standard OE pulleys Standard: low drag with hardened steel races and ceramic ball bearings Coated: metallic layer that covers bearing races making them 75% harder than steel. Even lower friction and highly resistant to corrosion 9100 9150 8000 SS 8050SS is not compatible with