CeramicSpeed OSPW - Coated - SRAM eTap -RedThe 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 two oversized 17 tooth aluminum pulley wheels with Grade 3 Silicon Nitride balls Robust cage crafted from polyamide and carbon fiber for durability and light weight Coated bearing races increase bearing service life by increasing hardness of race and
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