The set of two 11-tooth Shimano wheels fits rear derailleur of Ultegra (RD 6600), Deore XT (RD M772/771/770), SAINT (RD M800) group. The set includes an upper guide sprocket with a sealed ceramic plain bearing and a lower tension sprocket using a machine bearing with beveled edges. These allow the chain to run better on uneven surfaces. The wheels provide ideal, light and quiet operation, are compatible with Shimano 10- and 9-speed cassettes and weigh only 22g.
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