Seller notes

Renthal Ultralight Rear Sprocket 490U-520-45P-HA Renthal sprockets are CNC-machined (not stamped) and feature a computer-aided ultra-light design to reduce unsprung weight and increase power transfer Rear sprockets are made from high-strength, specially enhanced 7075 T-6 aluminum that is 33% lighter than steel to further reduce weight and increase power transfer without sacrificing strength Rear sprockets also feature a special tooth profile that allows the chain to roll easily on and off the sp...

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