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NEW Shimano GRX 812 Bike Rear Derailleur RD-RX812 IRDRX812 fit 11-40T,11-42T | eBay
Shimano GRX - Gravel Bike Tech - A new series of technical articles - 3T Blog
Shimano's gravel-oriented GRX mechanical components include a 1x and 2x rear derailleur. Due to a
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Modified Shimano GRX RD-RX812 1x11 spd rear derailleur to supports 2x11 spd w/ 11-46T cassette. - YouTube
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