Shimano XTR M9250 Di2 Wireless Upgrade Kit I-Spec EV SGS Rear Derailleur 51t Max

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From BikeTiresDirect

The Shimano XTR M9250 Di2 Wireless Upgrade Kit let you convert your existing Shimano 12-speed Mountain Bike into a wireless wonder. This upgrade let's your keep the same chain crankset and cassette you already have to make it as easy as possible to experience the latest generation of XTR excellence. | Shimano XTR M9250 Di2 Wireless Upgrade Kit I-Spec EV SGS Rear Derailleur 51t Max