The 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 hardness of race and reducing corrosion

Four spring tension settings allow customized setup based on ride conditions

Only compatible with the ‘2X-specific’ GRX 810 GRX 815 as well as the RX800 and RX805 derailleurs

Cassette compatibility up to 11-36t

CeramicSpeed products with coated bearings include a lifetime warranty

Largest Cog	36
Fits Model	Ultegra RX 805
Fits Brand	Shimano
Drivetrain Speeds	11
Defined Color	Black
keyword search	OSPWS
Color	Black