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Variously referred to as a 'thingamajig' or 'rollamagic', this Rollamajig is a simple and amazing device that reduces friction and shortens derailleur cable length for quick, crisp shifting. Its flip-away uncloggable design employs a toothed roller to keep the cable well controlled, even in the gunk. Net weight: 7 grams Shimano and ESP compatible. |
