Cycling · Practical guide
Bicycle inner tubes: read the tyre and valve first
Choose a replacement inner tube using the tyre's marked size, valve type and wheel requirements.
Photograph the size printed on the tyre and the valve before shopping. Names such as “road” or “mountain bike” are too broad to identify a tube. Ask a cycle shop to check the information if the markings are unclear.
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Match the size range
A tube normally covers a stated range of tyre sizes. Confirm your tyre falls within that range using the manufacturer's sizing information. Do not rely only on wheel-inch labels when more precise markings are available.
Check valve type and length. Deep rims may require a particular valve arrangement, and the valve must suit the rim and pump. A correct diameter with the wrong valve still leaves you with an unusable spare.
Understand your tyre system
Some bikes use tubeless setups or other arrangements that change repair needs. Check the wheel and tyre documentation before assuming a standard tube is the intended replacement. Carry supplies appropriate to your actual system.
A puncture can have an underlying cause, such as a sharp object or damaged component. If you are learning repairs, get a demonstration and inspect safely instead of repeatedly fitting new tubes into the same unresolved fault.
Build a usable spare kit
- Record tyre markings and valve details.
- Check the spare against the manufacturer's size range.
- Practise the relevant repair with competent guidance at home.
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Bicycle inner tube
Buy the correct size range and valve, ideally before a puncture occurs. A spare is useful only if you also have compatible inflation equipment and know how to fit it safely.
Tyre levers
Choose levers suitable for your wheel and tyre system. Follow the manufacturer's repair guidance and avoid improvised metal tools that can damage components.
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