29" plus wheels using Duroc 50 rim (50mm outer/46mm inner width) with SunRinglé STR Tubeless technology SRX cartridge bearing straight pull hubs with a 3 pawl alloy cassette body and 24 tooth ratchet ring, yielding 72 engagement points Built with double butted Wheelsmith spokes and alloy spoke nipples Each wheel includes tubeless tape, valve and a 2oz bottle of STR sealant Rear wheel includes XD and Shimano Micro Spline driver bodies