How not to drill the tube tube ?

Inflate the inner tube just enough for it to take round form.
Use the plate side of the tire tools to know exactly where is the point in relation to the rim side.
Do not exceed the vertical when you switch the tire tools tu push the tire.
Do by small steps, be careful what has opposite side of the tire is properly the down of the rim and not on the upper side.

demontage pneu pitbike 1 par ertu5504


demontage pneu pitbike 2 par ertu5504