CeramicSpeed's OSPW RS for Shimano Road 105 R7150 has been lifted with a distinctly modern and angular design. The updated design brings balance and refinement to the OSPW RS System allowing it to blend seamlessly into the contemporary design trends of bikes and groupsets - making up the whole of which the OSPW System is part. Innovative tech features of the OSPW RS meets consumer demands for a premium ride experience. The design for the OSPW RS isn't solely a visual update. The cage itself has been reinforced to offer new levels of strength and durability. The CeramicSpeed OSPW RS System continues the tradition of providing optimization and increased efficiency of the rear derailleur through its extremely low-friction bearings and unique overall design.Injection Molded Carbon Fiber reinforced PA cage offers new levels of strength and durabilityAnodized aluminum 5-spoke 13-tooth upper and 19-tooth lower pulley wheels are light weight and durableGrade 3 Silicon Nitride ball bearings are 400% smoother, 128% harder and 58% lighter than standard steel balls normally used in the bicycle industry4 customizable spring tension settings for optimal setupCompatible with Shimano 105 R7150 12-speed rear derailleursItem SpecificationsDefined ColorBlackDrivetrain Speeds12Fits BrandShimanoFits Model105 R7150Largest Cog36 CeramicSpeed OSPW RS Pulley Wheel System for Shimano 105 7150 Cage Assembly EAN: 5711050125968