OSPW System for Shimano Dura Ace 9200 and Ultegra 8100 Series Element Aerodynamic performance without compromise

Aerodynamic performance without compromise

And despite its amazing storage capacity

micro-vented Coolskin palm

Together they create AfterShock technology

OSPW System for Shimano Dura Ace 9200 and Ultegra 8100 Series Element Aerodynamic performance without compromiseThe CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low friction bearings and unique overall design. Features 13 tooth upper and 19 tooth lower, aluminum pulley wheels with Grade 3 Silicon Nitride balls Robust cage crafted from polyamide and carbon fiber for durability and light weight Hardened steel bearing races Compatible with Dura Ace 9200 and Ultegra 8100