Gravel bike frames with a UDH capable dropout interface are compatible with SRAM RED XPLR AXS. Chainstay lengths down to 415mm are endorsed with 47.5 mm chainline. RED XPLR AXS can be used on bikes with chainstay lengths between 405 and 415 mm with a standard road crankset with a 45 mm chainline. Rear suspension designs where the chainstay length varies are not supported. See our frame fit specification for more details.