BUY ANY OPSW AERO LIMITED EDITION SYSTEM AND GET A FREE UFO FACTORY OPTIMISED CHAIN 

Fast Just Got Faster
The world’s fastest Pulley Wheel system just got faster. OSPW Aero features a lifetime warranty and is wind-tunnel tested to have 40% less friction compared to a stock derailleur, making it perfect for time trials or triathlons.

Handbuilt, By the Best
The OSPW Aero is an industry-leading product co-developed with one of the world’s leading aerodynamicists; Simon Smart and is chosen by World Champions and top athletes around the world. This OSPW system has hand built CeramicSpeed Bearings installed and its unique design and craftsmanship will captivate you from the first time you use it.

Perfect Craftsmanship
The system features a 13-tooth upper Pulley Wheel and a 19-tooth lower Pulley Wheel to provide absolute optimisation of the rear derailleur and the upper and lower oversized
• Reduces aerodynamic drag on the rear derailleur by up to 60%
• Co-developed with Drag2Zero
• Reduces friction by 35-40% over stock pulley configuration
• Chosen by World Champions
• Custom moulded cage

Technical Specifications
• Pulley Wheels:13/19t
• Pulley Material: Aluminium
• Derailleur Brand: Shimano
• Chain: Shimano 11sp Factory Optimised UFO Chain

In The Box
• Complete 13-tooth/19-tooth OSPW Aero Limited Edition System
• Shimano 11sp Factory Optimised UFO Chain 
• CeramicSpeed Oil for Pulley Wheel Bearings, 15ml. dropper bottle

Compatible With
Models: Dura Ace RD-9100 and Ultegra RD-8000

Mfr Claimed Weight
159g