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12. MANAGING TYRE PRESSURES
The recommended tyre pressures are given in the vehicle handbook and are designed to give the
best balance between comfort, road-holding and fuel economy for a given vehicle. The side-wall of
the tyre is embossed with the maximum pressure for the tyre. This is NOT the recommended service
pressure.
Under-inflated tyres have a greater rolling resistance, so they waste fuel and wear faster. Driving on
tyres below a critical inflation pressure can cause a blow-out, and can damage wheel rims because
the tyres are no longer supporting the vehicle. Over-inflation reduces grip and causes uneven wear.
12.1 Effect of temperature
Tyre pressures are specified for cold tyres, but the tyres warm up when driving, and the pressure
increases by about 10% in normal service. Tyres should therefore be inflated to the recommended
level before they are heated by driving. In winter, tyre pressures fall due to lower temperatures and
additional air is required to bring them to the manufacturer’s recommended level. If a tyre overheats, it
may blow out or cause permanent damage to the sidewall.
12.2 Service and warranty
Please register your warranty by completing details on our website. The system is warranted to be
free from manufacturing defects and is guaranteed for a period of twelve months from date of
purchase. There are no user-serviceable parts inside and if internal parts have been tampered with
the warranty will be void. The warranty does not affect your statutory rights.