29" wheels using Duroc 30 rim (30mm outer/27mm 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 two driver bodies NonBoost models include end caps for both 10x135mm QR/12x142mm TA and 9x100 QR/15x100 TA