2torial #0707:
Learn2 Fix a Bike Flat (continued)

Replace the tire on the rim

Getting the tire back onto the rim without damaging the tube can be a bit tricky. The safest way to do it is by using your hands. Use a tire iron only if you absolutely have to.

Starting at the valve, begin to slip the tire bead back over the rim with your fingers. If you push the bead into the center well, you'll create a bit more slack in the tire and make your task easier. Continue working in one direction around the wheel, until the bead is almost completely reseated. Take your time, and make sure the tube doesn't get pinched between the rim and the tire.

When only 2 to 3 inches (5 to 7.5 centimeters) of unseated tire remain, wrap your fingers around the tire and grasp the remaining bead. Firmly push the last of the bead back over the top of the rim until it seats inside. You may have to use your palms or, as a last resort, a tire iron to get this last section back on the rim.

Push the valve partially back into the hole. This will help the tube seat properly. Pull the valve back out, and make sure it's sticking straight out from the rim. You can adjust an angled valve by grasping the tire and tugging it along the rim until the valve is straight.

Once the tire is on, squeeze its sides and check it to make sure no part of the tube is caught between it and the rim. Then partially inflate the tube, and make one last visual check. Make sure it's inflating evenly, and that no portion of the tube is visible. Fully inflate the tube and replace the valve cap.