absoluteBLACK Carbon Ceramic derailleur pulleys OSPW SHI Ultegra 8100/8150

Compatibility: Shimano Ultegra 8100/8150. For cartridges up to 34z.
Weight: 71g
Made of carbon polymer, AL7075, rubber, ceramic.

Product ID: 19213

About the brand Absolute Black

WORLD'S BEST OVAL CHAINRINGS THAT HELP YOU INCREASE YOUR PERFORMANCE BY UP TO 9%. Oval chainrings don't produce more power, they increase your pedalling effectiveness. This means they reduce the component of your pedal pushing force, which doesn't contribute to moving your bike forward. The less force you waste the more energy you preserve, allowing you to push harder when it counts or simply reduce tiredness.