CeramicSpeed OSPW System SRAM MechanicalThis OSPW System SRAM Mechanical from CeramicSpeed is an advanced rear derailleur pulley system that offers fast, efficient and smooth drivetrain performance. Ideal for use with SRAM Red and Force 10 and 11-Speed groupsets, this OSPW System includes industry-leading bearings and pulley wheels for enhanced power output.The unique oversized design provides riders of this Oversized Pulley Wheel System with efficiency savings starting at 40% over stock SRAM derailleur pulley wheels. This specific SRAM Mechanical version of the Oversized Pulley Wheel System is only compatible with RAM Red and SRAM Force 10 and 11-Speed mechanical rear derailleurs. The OSPW System for SRAM mechanical derailleurs is compatible with both short cage and WiFli derailleur bodies. This system for SRAM features two oversized 17-tooth aluminium pulley wheels which are housed within a robust cage crafted from a compound of polyamide (PA) and carbon fibre. The OSPW System for SRAM fits up to 32-tooth cassettes. This revolutionary OSPW System is developed, produced and assembled by hand in Denmark. This plug-and-play product is the result of an in-depth development process and has been designed for optimal performance. Created to answer the need for less friction (as much as 60%), increased speed and a more efficient drivetrain. This OSPW System helps you ride any distance comfortably. The optimisation of your drivetrain with the new CeramicSpeed OSPW System delivers access to industry-leading efficiency. The use of high-quality materials means this system will outlast other commonly used pulley wheels on the market. Like all other products delivered by CeramicSpeed, this product has undergone a thorough testing program and is used by professional triathletes Tim Don and Tyler Butterfield. Since its introduction in 2015, the CeramicSpeed Oversized Pulley Wheel System has been through 13 unique derailleur compatibility developments. No other pulley system has the depth of use and trust as the CeramicSpeed OSPW, which counts both Men’s and Women’s Triathlon World Champions, World Tour professional road teams, XCO professional MTB Teams, and elite athletes worldwide as its users. Features: Compatibility: SRAM Red and SRAM Force - 10 and 11 speed Fits up to 32-tooth cassettes They offer 3-5 times longer lifetime than the commonly used standard pulleys on the market In The Box: Oversized Pulley Wheel System CeramicSpeed Bearing Oli in 15ml dropper bottle Sticker SheetBuy CeramicSpeed Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.