CeramicSpeed makes some of the strongest, most accurate and lightest rolling bearings on the market, they are all ceramic.

Ceramic bearings also provide better utilization of one's watts.

This set of pulley wheels has 12 teeth in a narrow-wide design which ensures that the chain holds well, while at the same time reducing friction on the chain.

They fit Shimano's 11 speed rear derailleurs.

Made of aluminum and with ceramic bearings.

607 bearings.

Fits to:

Shimano RD R9100

Shimano RD R9150 Di2

Shimano RD R8000

Shimano RD R8050

Shimano RD-RX800

Shimano RD-RX805