Affordable Gravel disc wheels, a great upgrade for heavy stock OEM wheels . 21mm wide 6061 alloy clincher rim, ideal for wider tires . Sealed cartridge bearing front and rear hubs, Center Lock rotor interface . 4 pawls engaging simultaneously on 36 teeth (10 degrees of engagement). Swappable hub end caps for any axle configuration. Pillar TB2018 round double butted spokes with brass nipples. HG 11sp road: Compatible with HG splined Shimano/SRAM 11sp cassettes. Also compatible with Shimano/SRAM 8-10sp cassettes with spacer. XDR is 1.85mm longer than XD Driver, occupies the same space as an 11-speed HyperGlide road driver. Optional 15×100, QRx100, and QRx135 hub end caps sold separately . Swappable XDR, Microspline, and Hyperglide freehub bodies sold separately . Made in USA