Duroc wheels feature a lightweight, double-walled rim designed to support aggressive riding with high-volume and true plus-sized tires. SRX hubs are easily serviceable and offer 90 points of engagement. - Includes everything you need to get riding, both Shimano and SRAM XD style freehub drivers, tubeless tape pre-installed, valve, and sealant - SRX hubs use sealed cartridge bearings