Shifters: Shimano Ultegra ST-6510. - Rear Derailleur: Shimano Ultegra RD-6500 long cage. - Crankset: Shimano Ultegra FC-6503 175mm 52/42/30. Listed is a used Shimano Ultegra/105 mixed group, which has only seen a few hundred miles and is very clean.
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