Affordable Road rim brake 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 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 810sp cassettes with spacer Optional 15x100, QRx100, and QRx135 hub end caps sold separately Swappable XDR, Microspline, and Hyperglide freehub bodies sold separately Made in USA