First Generation Derauiller Pulleys for Campagnolo 11 speed - Hybrid Ceramic WHEEL BEARINGS plug-and-play solution that allows you

plug-and-play solution that allows you to quickly press in the cups and the GXP reducer

By replacing your stock 12-tooth pulleys with a 14-tooth top pulley and a 19-tooth bottom pulley

We wouldn't build it if it weren't gravel proof

Kolossos ensures maximum drivetrain efficiency

First Generation Derauiller Pulleys for Campagnolo 11 speed - Hybrid Ceramic WHEEL BEARINGS plug-and-play solution that allows youThese pulleys spin on Grade 3, Abec 5 hybrid ceramic bearings. The same bearings as our bottom brackets. Choose road bearings for lowest friction on road bikes or cross bearings if durability is key (that's for you, cross and gravel racers). The wheels are made of aluminum, which will make them more resistant to wear in muddy conditions. Out of the box, these pulleys will fit on: Shimano road and MTB 10 and 11 speed Campagnolo 11 speed Sram 2x MTB