27.5" plus wheels using 50 Duroc 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 Laced up with time tested double butted Wheelsmith spokes Includes tubeless tape, valve and 2oz bottle of STR sealant Rear wheel includes XD and Shimano Micro Spline driver bodies NonBoost models include end caps for both 10x135mm QR/12x142mm TA or 9x100 QR/15x100 TA