CeramicSpeed Ceramic Oversized Pulley Wheel Black Campagnolo.

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

Ceramic bearings also provide a better utilization of one's wattage.

Oversized Pulley wheels are, as the hub suggests, pulley wheels that are larger than normal, this gives less movement in the chain, which therefore gives less energy loss and ultimately a greater power transfer.

For Campagnolo 10 and 11-speed rear derailleurs.

Comes with a new rear derailleur arm so you can change the whole set that way.

Made of aluminum and with ceramic bearings.

607 tenants.