[fordwife]

Here is how I mount 30x3 1/2 tires : take an old 21" model a wheel, weld an inner rim to the top of it and bolt it through the center with a piece of all thread to a sawhorse. bolt the clincher rim to it and it is just the right height to mount the tire and tube in the regular way. Sure saves wear and tear on my 83 year old back.