OSPW System for Shimano Dura Ace 9200 and Ultegra 8100 Series Element Together they create AfterShock technology

Together they create AfterShock technology

while still allowing room for a jersey or baselayer underneath

During big hit events

Designed with your ultimate comfort in mind

Aerodynamic performance without compromise

OSPW System for Shimano Dura Ace 9200 and Ultegra 8100 Series Element Together they create AfterShock technologyThe 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