CeramicSpeed OSPW - Red/Force AXSThe 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 a 15 tooth upper and 19 tooth lower, aluminum pulley wheels with Grade 3 Silicon Nitride balls to provide absolute optimization of the rear derailleur Robust cage crafted from carbon reinforced polyamide for durability and light weight Two spring tension
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