Remove the wheel from the bike
Release all remaining air from the tire
Use tire levers to pry one side of the tire bead off the rim
Pull the old tube out of the tire
Inspect the tire and rim for thorns, glass, or sharp debris
Check the rim strip for damage or misalignment
Slightly inflate the new tube so it holds its shape
Insert the valve stem through the rim hole
Tuck the tube evenly inside the tire
Push the tire bead back onto the rim, starting opposite the valve
Make sure the tube is not pinched between the tire and rim
Inflate the tire partway and check that the bead is seated evenly
Inflate the tire to the recommended pressure
Reinstall the wheel on the bike
Spin the wheel and check for proper seating and smooth rotation