so recently i ordered a new Renthal rear sprocket but unfortunately i got the wrong one i ordered a 520 (Renthal says that it had a 520) and come to find out i had a 530 chain and and sprockets. did the RC51 come originally with a 530? and what are the benefits of changing to a 520? weight?
BTW would any one want to trade a Renthal 520 42t for a 530 40T?
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00 RC51, Jardine 2 into 1, PC 3, flapped, K&N