A beginner-friendly overview of removing the wheel, finding the cause, repairing or replacing the tube, and checking the tire.
Before removing anything
Stop riding on a fully flat tire. Inspect the outside of the tire for an obvious sharp object, note the brake and axle arrangement, and make sure you know how your wheel is retained.
Work from observation rather than assumption: identify the exact component or symptom, consult the relevant specification when one exists, and verify the result before returning the bicycle to normal use.
Find the cause, not just the hole
After removing the tube, inflate it slightly and locate the leak. Then carefully inspect the corresponding tire and rim area. Installing a fresh tube without removing the cause can produce an immediate second puncture.
Work from observation rather than assumption: identify the exact component or symptom, consult the relevant specification when one exists, and verify the result before returning the bicycle to normal use.
Reinstall carefully
Avoid pinching the tube beneath the tire bead. Confirm the tire is seated evenly before bringing it to normal pressure, and verify the wheel is secure and the brake operates correctly before riding.
Work from observation rather than assumption: identify the exact component or symptom, consult the relevant specification when one exists, and verify the result before returning the bicycle to normal use.
When to stop
A damaged rim, badly cut tire, uncertain axle installation, or recurring unexplained punctures deserves closer inspection or professional help.
Work from observation rather than assumption: identify the exact component or symptom, consult the relevant specification when one exists, and verify the result before returning the bicycle to normal use.