Campagnolo Hub cup For rear wheels and pre-2015 front wheels 4pcs HB-RE124 CheckoutSpec= 52 - 57cm }SRAM XX1 11-Speed Rear Derailleur

}SRAM XX1 11-Speed Rear Derailleur B-Bolt and Limit Screw Kit

} Vent Valve Technology for super simple service if the need arises without any disassembly of the post Lower friction IFP allows for faster actuation of the post and less force needed AXS™ enabled allowing for customization to an individual rider’s liking via the AXS™ Mobile App Includes battery and charger Requires AXS handlebar controller (sold separately) SRAM Model ID: SP-RVB-AXS-A2

Compatible with 29 wheels with Tacx trainer tire

Length 255 Gender/Age Unisex Color Black Rail Material Chromoly Weight 350 Saddle Cut Out Yes Width 180 Material Synthetic Defined Color Black Clamp Style Std Rails

Shifter is not compatible with 11 speed MTB derailleurs

Campagnolo Hub cup For rear wheels and pre-2015 front wheels 4pcs HB-RE124 CheckoutSpec= 52 - 57cm }SRAM XX1 11-Speed Rear DerailleurCampagnolo Fulcrum cup for OS Hubs Sold Singly. Campagnolo Other Hub PartsCampagnolo hub part for repair or replacement