Method of fitting an assembly formed of a tire and of a tread strip support

A method of fitting a tire and a tread support ring on a one-piece wheel rim comprising a first wheel rim seating surface, a second wheel rim seating surface, a tread support ring bearing surface connected axially on the inside of the first wheel rim seating surface and a small hump at the outer end of the first wheel rim seating surface, at least the first wheel rim seating surface tapering outwardly and the second wheel rim seating surface having its axially inner end on a circle of a diameter greater than the diameter of the circle on which the axially inner end of the first wheel rim surface is located, the tire comprising a first bead (2') and a second bead (2") which will surface is located, the tire comprising a first bead (2') and a second bead (2") which will be fitted respectively on the first wheel rim seating surface and the second wheel rim seating surface, the method comprising:

• in a first stage, inserting the support ring into the tire,
• placing the second bead (2") onto the wheel rim from the side opposite to the second wheel rim seating surface and moving it over the bearing surface using positioning means,
• fitting the first bead on the first wheel rim seating surface, the first bead engaging the support ring to seat it on the bearing surface,
• and then completing the fitting of the second bead on the second wheel rim seating surface.