24mm internal carbon rims optimized for gravel tires 35mm and larger X5 hubs with sealed cartridge bearings Sapim double butted straightpull spokes with alloy nipples Center Lock disc rotor compatible 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