Tyre Information and Safety Guides

Find clear information about tyre pressures, warning lights, tyre sizes, load and speed ratings, plus downloadable safety guides for cars, caravans and motorhomes.

Choose a topic below to open the relevant guide, chart or vehicle index. These resources can help you understand tyre pressures, sidewall markings and ratings, but if you need hands-on assistance in Norwich or Norfolk you can also use our mobile tyre fitting service, locking wheel nut removal service or contact us for help.

Car tyre connected to a digital tyre pressure inflator

Find Your Vehicle’s Tyre PressuresLook up tyre pressures, tyre sizes and wheel-torque information by vehicle.Open Vehicle Index →

Tyre Pressures

Cold Weather Tyre PressureHow colder temperatures can affect tyre pressures.Read guide → How to Check Tyre PressuresA straightforward guide to checking pressures correctly.Read guide → Tyre Pressure Warning LightWhat to do when the warning light appears.Read guide → PSI, Bar and KPA ChartConvert common tyre-pressure measurements.View chart → Tyre Pressure Vehicle IndexFind pressure, size and wheel-torque information by vehicle.Open index →

Tyre Sizes and Ratings

Tyre DefinitionsUnderstand common tyre terminology and features.Browse definitions → Tyre Load Rating IndexCheck what tyre load-index numbers mean.View chart → Tyre Size Conversion ChartCompare common tyre-size measurements.View chart → Tyre Speed Rating ChartUnderstand the letters used for tyre speed ratings.View chart → Understanding Tyre SizesLearn how to read the markings on a tyre sidewall.Read guide →

Downloadable information

Tyres and Your Safety

Tyres are the vehicle’s only contact with the road. Acceleration, braking, steering and cornering all depend on a relatively small contact area, so correct selection, pressure and maintenance are essential.