Sun Ringle 29" Charger Pro SL Wheelset 9/15/20 Black Premium, cartridge bearing, straight-pull hubs Wheels are shipped with 9,15 and 20mm front end caps, rear 135mm QR and 12x142 Thru-Axle end Trail and All-Mountain use Stan's NoTubes BST Technology Premium, cartridge bearing, straight-pull hubs