Renthal 408U42047G MX Ultralight Grooved Silver 47T Rear SprocketRenthal 408U42047G MX Ultralight Grooved Silver 47T Rear Sprocket Ultralight Rear Chainwheels Renthal UltraLight Rear Chainwheels are CNC machined in Manchester, UK from 7075 T6 aluminum to extremely tight tolerances, 66% lighter than steel. Computer engineered and tested to ensure a precise fitment, concentricity and load dispersion with tooth profiling to provide maximum power transfer. With Renthal's combination of high strength base material,
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