Durable bike scarf-CeramicSpeed Oversized Pulley Wheel System Aero Coated - Shimano Dura-Ace 9100/Ultegra 8000

The CeramicSpeed Oversized Pulley Wheel System is the secret to increasing the efficiency of your derailleur through friction reduction. This version is optimized for Shimano Dura-Ace or Ultegra 11-speed systems. This version features coated bearings, leading to outstanding efficiency and a very long life of like-new performance. This coating makes them 75 percent harder than steel. An aerodynamic carbon cage has been added to help racers keep their aero edge and move faster than ever. This covered version of the OSPW is perfect for triathletes and time trial riders. It has seen action in major World Tour and Ironman races. The upper pulley has 13 teeth while the lower has 19. The CeramicSpeed Oversized Pulley Wheel System Aero helps you get the most out of your 11-speed Shimano road groupset.