Step 11: Once the tire is completely on, check for any visual signs that the tube might be pinched. Once the coast is clear, add air until the tire bead pops on both sides. If stubborn, use some more Windex to help ease it on. Often pulling the valve stem core and completely flatting the tube once or twice helps if the tube is being extremely difficult. Once the bead is secure, adjust the tire to the proper inflation and tighten the rim lock and valve stem nuts.