Originally Posted by hagen2456

That's what I used to do for many years, and presta valves gave me a lot of troubles with that method. Now I first insert valve, then mount the "back side" of tire all around the rim, then inflate tube slightly and stuff it into tire as far as possible, then mount the "front side" of the tire. Make sure the tire is "wrapped around" the tube from the start, around the valve. It helps to push the valve (and by doing that, the tube) partly into the tire. The last part to mount - right opposite valve - is the difficult part, and the place where one must take care not to pinch the tube. Most combinatins of rim/tire can be mounted by hand alone, but some will need a lever.