Split Aluminum Rear Gear for the 520 Chain, 23, 24, 25, 26, 27, 28, 29, 30, 32, 34, 36 tooth in stock. These are the good old style not the new ones that are too wide for the chain and strip out. ** to order gears put in the total number of gears you would like, then when you checkout put the specific tooth numbers in the coment box**
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