Tyre Pressure – Why It Matters and How to Check It

Introduction

Maintaining the correct tyre pressure is a vital part of road safety and vehicle performance, but it’s often overlooked by new drivers. Under- or over-inflated tyres can affect handling, braking, fuel efficiency, and even lead to dangerous blowouts. Driving instructors are in the perfect position to instil routine tyre checks as part of everyday vehicle safety.

Why Tyre Pressure Matters

• Safety: Incorrect pressure increases stopping distance and reduces grip, particularly in wet conditions.
• Fuel Efficiency: Under-inflated tyres create more rolling resistance, using more fuel.
• Tyre Wear: The wrong pressure causes uneven wear, shortening the life of tyres.
• Legal Compliance: Driving with incorrect tyre pressure could result in an MOT failure or legal penalties if found unroadworthy.
• TPMS warning light and your car may not go out on test

How to Check Tyre Pressure

1. Find the recommended pressure – This is in the vehicle handbook or inside the fuel cap/driver’s door.
2. Use a reliable pressure gauge – Digital gauges or petrol station air pumps are ideal.
3. Check when tyres are cold – Heat increases pressure slightly, so measure before driving.
4. Adjust accordingly – Inflate or deflate to match the manufacturer’s recommendations.

Encourage learners to check their tyre pressure regularly, and before long trips or seasonal weather changes. Use the tyre pressure check as an opportunity to check the overall condition of the tyre.

Teaching Tip for ADIs

Include a short tyre pressure check demo as part of practical vehicle prep. Encourage learners to make it a habit, especially before long journeys or extreme weather.

Tyre pressure checks are part of the SMTM and how well they are done at the beginning of the test can set the tone for the test.