Overview
This guide explains the step-by-step process for removing and replacing a bicycle wheel's inner tube, including inspection, installation, and troubleshooting tips.
Required Tools and Supplies
- Tire levers are necessary to remove the tire from the rim.
- A pump or CO2 cartridge is needed to inflate the inner tube.
- Always carry a spare inner tube while riding.
Preparing to Remove the Tube
- Ensure the wheel is removed from the bicycle before starting.
- Completely deflate the inner tube using the appropriate method for Presta, Schrader, or Dunlop valves.
- Remove any dust caps and valve nuts as required.
Removing Tire and Tube
- Push both sides of the tire toward the rim center to loosen the bead.
- Use tire levers to lift the tire bead over the rim and fully remove the tire and tube.
Inspecting for Damage and Causes
- Carefully inspect the inner tube for holes by inflating it and listening or feeling for air leaks.
- Immerse the inflated tube in water to locate small leaks, marking the hole if found.
- Examine the tire for embedded objects or casing damage.
- Check for signs of snake bites, blowouts, or damage due to improper tire seating.
- Inspect the rim and rim strip for sharp edges or failures that could cause tube punctures.
- If the valve is suspected, apply soapy water to check for bubbles indicating a leak.
Installing the New Tube and Tire
- Partially inflate the new tube to give it shape, then insert it into the tire.
- Align the valve stem straight with the rim and tire pressure markings.
- Install one tire bead, place the tube fully inside, then work the second bead onto the rim.
- Use tire levers with care to avoid pinching the tube.
Final Checks and Inflating
- Ensure the tire bead is evenly seated and the tube is not visible beneath the bead.
- Inflate the tire partially, inspect for bead irregularities, and adjust as needed.
- Use soapy water to help seat stubborn beads, never grease or oil.
- Inflate the tire to recommended pressure, reattach all valve hardware, and reinstall the valve cap if desired.
Recommendations / Advice
- Patch damaged tubes only as a temporary fix; use a spare tube for immediate repairs.
- If the tire casing is damaged, use a tire boot as a temporary repair and replace the tire soon.
- Always inspect for and eliminate the root cause of a puncture to prevent future flats.
Action Items
- TBD – Rider: Replace or patch inner tube as needed during a flat.
- TBD – Rider: Check and repair tire, rim, and valve issues before reassembly.
- TBD – Rider: Replace tire if casing is damaged beyond a temporary boot fix.
- TBD – Rider: Subscribe for future instructional videos.