The OSPW Aero ALPHA adds an aerodynamically shaped carbon cage to CeramicSpeed's fastest pulley system, for Shimano Dura-Ace 9250 and Ultegra 8150 Di2. Built for time trial, triathlon and aero road bikes.

Why oversized?

Larger pulley wheels mean the chain bends less as it wraps around them, which cuts drivetrain friction. Combined with CeramicSpeed's hand-built hybrid ceramic bearings, an OSPW system is one of the most effective drivetrain upgrades you can make.

ALPHA technology

• ALPHA Disc pulleys with patented ADR (Active Debris Remover): stainless dust shields and a bladed groove that pushes contamination away from the bearing
• Hand-built hybrid ceramic bearings
• Injection-moulded carbon cage
• Hand-built in Denmark with a lifetime warranty

Available from The Cycle Collective in Dorking. Our workshop can fit and set up your OSPW system.