SRAM created the XDR and XD drivers to allow us to run cassettes that had cogs with less than 11 teeth, which is great if you want to go and run a 1x drive train and still have a big top gear. It will help to eliminate the topping out that some of us were getting on the flat and the much more likely topping out when we were descending.
May 20, 2019
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2019 27.5er 29er 50mm A9 AC066 Aero aero 35 AERO wheelset aerodynamics BB30 BB86 Bottom Brackets carbon fat bike wheelset carbon frame carbon wheel carbon wheelset climbing cn cycling tips cyclingtips disc downhill DT E.T.R.T.O. Fast and light series fat bike fame fat bike frame Fat Bike Guide 2019 fatbike fatbike frame fatbike wheelset FL Wheelset frame freehub GRA02 icancycling mountain bike MTB psr road bike tire sizing Road Frame road weight weenie frameset road wheels roadbike S7 SN01 SN02 SN04 spaim spokes SRAM SRAM XD superlight Suspension Tires Weight Weenie wheelset wheelset guide workshop XDR XDR driver