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Renthal hard anodised rear sprockets are precision CNC manufactured to extremely high tolerances. The high strength is especially enhanced by using a 7075 T6 aluminium alloy coated in an ultra-hardwearing finish for extreme mileage. The rear sprockets computer-aided design gives the maximum reduction of unsprung weight at the rear wheel, to give maximum power transfer. The Renthal rear sprockets are 33% lighter than steel and the self-cleaning mud grooves prevent dirt buildup and help keep the sprocket clean.