bikingboy front 13t rear 48t-52t sprocket 520 120l x-ring chain for 125-530 250 350 450 exc mxc sxf gs smr sx xc sxs 98-16

sprocket 520 520 chain sprocket chain.we offer the wholesale price, quality guarantee, professional e-business service and fast shipping . you will be satisfied with the shopping experience in our store. look for long term businss with you.