Spare Tyre Guide: Pressure, Space-Saver Limits and Safe Replacement Tips

A spare tyre is one of those items most drivers forget until they urgently need it. Unfortunately, a spare can lose pressure, age or become unusable while sitting untouched for years.

Checking it a few times a year takes only minutes and can make a puncture much easier to handle.

Check spare tyre pressure regularly

Spare tyres lose air just like the tyres in regular use. A full-size spare may use a pressure similar to the road tyres, while a compact space-saver often requires much higher pressure.

Check the label on the spare or the owner’s manual. Do not guess. Our tyre pressure guide explains why pressure should be checked when tyres are cold.

What is a space-saver spare?

A space-saver is a smaller, narrower temporary wheel designed to reduce weight and boot-space use. It is not intended to replace a normal tyre for everyday driving.

Most space-savers have a maximum speed printed on the tyre or wheel. Many are limited to around 80 km/h, but you must follow the exact marking for your vehicle.

How far can you drive on a space-saver?

Only as far as necessary to reach a safe repair facility. The smaller tyre can affect handling, braking and stability. Long-distance or high-speed use should be avoided.

Does a spare tyre expire?

Tyres age even when they are not used. Rubber hardens over time, and cracking can develop. Check the manufacturing date and inspect for sidewall damage. If the spare is very old, ask a tyre professional whether replacement is sensible even if tread depth looks new.

Make sure the jack and tools are present

A spare is useless without the correct jack, wheel wrench and locking-wheel-nut key. Check these items before long trips. The roadside emergency kit guide includes other useful items such as a warning triangle, torch and inflator.

Choose a safe place before changing a wheel

Do not attempt a tyre change in a live traffic lane or on unstable ground. Move the car as far from traffic as safely possible, switch on hazard lights and use a warning triangle where appropriate.

Use the correct jacking point

Cars have specific reinforced jacking points. Placing the jack under the wrong part of the body can damage the car or allow it to slip. Check the owner’s manual before lifting.

Do not work under a car supported only by the factory jack

The emergency jack is designed for wheel changes, not for working underneath the car. Never place any part of your body under a vehicle supported only by the roadside jack.

Loosen wheel nuts before fully lifting the car

With the car secure and the parking brake applied, loosen the nuts slightly before lifting. This prevents the wheel from spinning while you apply force.

Tighten nuts in a cross pattern

When fitting the spare, tighten wheel nuts gradually in a star or cross pattern so the wheel seats evenly. Final tightening should be done to the manufacturer’s torque specification when possible.

What if your car has no spare?

Some newer cars use a tyre-repair kit or run-flat tyres instead. Learn how the system works before a puncture happens. Sealant kits have expiry dates and cannot repair every type of damage.

Sidewall damage cannot usually be repaired safely

A nail in the tread may sometimes be repairable, but cuts, bulges and major sidewall damage usually mean the tyre must be replaced. Do not rely on sealant for severe damage.

Check the punctured tyre quickly

A temporary spare is only a short-term solution. Have the damaged tyre inspected as soon as possible. Continuing for days on a space-saver can affect braking and handling.

Before a long highway trip

Check the spare before leaving, along with regular tyres, fluids, battery and lights. Our roadside emergency kit guide and highway-trip preparation advice can reduce stress if something goes wrong far from home.

Final takeaway

A spare tyre should be treated as safety equipment, not forgotten luggage. Keep it inflated, inspect its age, know the speed limits for a space-saver and make sure the jack and tools are present. A five-minute check at home is far easier than discovering a flat or unusable spare at the roadside.