Like I said before its prob. tubeless. you whave to wipe a thin coat of grease or Vaseline on the wheel and bead of the tire. it prob still wont go on all the way till you air it up. be careful you don't pinch the tube when putting the wheel together its a pain when the bead don't set, it makes the tube squeeze together and it will want to go between the wheel halves. good luck. :laugh::laugh::laugh: