Anyone interested in selling or trading their used (but still in very good shape) rear sprockets? I want to go up some from the stock 48, but I don't want to buy 2 or 3 sprockets and test them out only to find I want something more. If anyone has a 50-54 tooth that they would let go cheap shoot me a PM or just post the info here. I'm in NC zipcode 27604 for shipping references. Thanks!