Road/CX/Gravel wheels with a range of axle options 24.0/27.5mm internal/external width welded alloy clincher rim, great for wider tires Sealed cartridge bearing front and rear hubs, Center Lock rotor interface Double butted spokes with alloy nipples HG 11sp road: Compatible with HG splined Shimano/SRAM 11sp cassettes. Also compatible with Shimano/SRAM 810sp cassettes with spacer XDR is 1.85mm longer than XD Driver, occupies the same space as an 11speed HyperGlide road driver