Bicycle puncture repair on the roadside
From flat tyre to riding again in about 15 minutes, with a patch kit or a spare tube.
Get ready (4)
- Move well off the road
- Check you have tyre levers, a pump, and a patch kit or spare tube
- Rear wheel flat? Shift to the smallest cog firstThe chain then comes off the wheel more easily.
- Open the brake if the tyre will not pass it, then release the wheel
Take it apart (5)
- Let out any air left in the tube
- Hook a lever under the tyre edge and work around one side
- Pull the tube out, starting opposite the valve
- Pump up the tube and listen or feel for the holeHold it near your lips or cheek, or use a puddle and look for bubbles.
- Run your fingers slowly around inside the tyreGo carefully. Remove the thorn or glass, or the next tube goes flat too.
Fix it (4)
- Spare tube? Use it and patch the old one at home
- Patch: rough up the rubber around the hole with the sandpaper
- Spread a thin layer of glue and wait until it is tackyAbout 5 minutes. Wet glue is the usual reason a patch fails.
- Press the patch on firmly for a minute
Put it back (7)
- Put a little air in the tube so it holds its shape
- Tuck the tube in, valve first
- Push the tyre back on with your thumbs, ending at the valveLevers can pinch the new tube, so use them only if you must.
- Check the tube is not trapped under the tyre edge
- Pump to the pressure printed on the tyre wall
- Refit the wheel, close the brake and spin the wheel to check it runs straight
- Squeeze both brakes before you ride off