Tyre speed rating and labelling guide
All you need to know about speed rating, tyre labels and how to choose the best tyres for your car
Buying tyres requires more research and thought than ever before. Not only is there more choice in terms of the types of tyre you can buy, such as runflat tyres, winter tyres and budget branded tyres, but there are now wet grip, fuel efficiency and sound decibel ratings to consider too.
Most tyres come with a wide range of information and they don't just display the make of tyre brand on the sidewall, they also show the wheel size and speed rating. Tyre labels are only attached to new tyres before they are fitted to vehicles to help buyers make an informed decision.
Tyre labelling: a complete guide
Tyre labelling was introduced by the European Union and the label includes an efficiency rating similar to those you’ll see on new fridges and washing machines. Each label should also feature three ratings; one indicates how the tyre performs in the wet, another rates the tyre’s efficiency and the third shows how noisy the tyre is. Read our guide below as we take you through all the information you need to know on labelling and tyre sidewall information.
The first chart on the label shows fuel efficiency on a scale of A to G, where A is best. The difference between grade A and grade G can be up to 7.5%, according to European Commission research.
The second chart shows the amount of grip the tyre can generate on a wet road, using the same A to G rating. The rule of thumb is that the stopping distance from 50mph between each grade is between one and two car lengths.
The difference between the stopping distance of an A and G-rated tyre could be 18 metres.
It’s important to note that the first chart measures something called rolling resistance, which is a force that resists motion when the wheel is turning. Effectively, by reducing rolling resistance, wet grip is also reduced so you’ll need to strike a balance between decent performance in both regards.
The third chart illustrates the external noise generated from the tyre when the car is travelling at 50mph. The noise is expressed in decibels (dB).
There’s also a symbol that looks a little like a wifi sign. One black arc means the tyre will be compliant with future legal limits, three black arcs represents the weakest performance and sits somewhere between the current maximum and forthcoming lower limits.
These regulations will apply to most tyres but some types of tyre for cars, light commercial vehicles and trucks are excluded, including:
RetreadsTemporary tyres and space saver spare tyresProfessional off-road or racing tyresStudded tyres – if the studs are fittedTyres intended for cars registered before 1 October 1990Tyres with a speed rating of less than 50mphTyres with a rim diameter of less than 254mm or more than 635mm
How to read a tyre
There’s a range of information printed onto the side of every road-legal tyre. As well as the tyre’s manufacturer, you’ll also find digits relating to the size and speed rating.
On the side of a tyre – also called the sidewall – you’ll find a series of digits, such as 215 45 R16 91 W E4.
The first three digits – 215 in this example – show the width of the tyre in millimetres.
The second two digits – 45 – show the height of the sidewall as a percentage of the tyres width. In this example, the tyre’s sidewall height is 45% of the 215mm width.
The letter R refers to the tyre’s construction. You’ll rarely see a letter other than R as it refers to radial – the most common type of car tyre.
The following two numbers – 16 – refer to the size of the wheel it will fit. In this instance, the tyre will fit a wheel of 16 inches in diameter.
The next two numbers – 91 – show the tyre’s load rating, but confusingly they don’t relate to the actual weight the tyre is able to carry. Here 91 denotes the ability of the tyre to carry 615kg. Load ratings range from 62 (265kg) to 126 (1,700kg).
The following letter – W – is the speed rating. You can find out more about this below.
The final pair of digits – E4 – is an approval mark showing it has been tested and approved by the European regulatory authorities. You should always check your tyres carry this approval.
What is a tyre speed rating?
The tyre’s speed rating represents the top speed the tyre is capable of maintaining. A letter that appears on your tyre’s sidewall illustrates the rating (see example above).
It essential you choose a tyre capable of travelling at speeds in excess of your car’s maximum speed – even though every tyre is capable of maintaining speeds of more than 70mph.
You could find your car insurance invalidated by using tyres with a lower speed rating than appropriate for your car.
How do I find the correct rating for my car?
The tyre speed ratings for your car will be listed in your vehicle’s owner’s manual. Alternatively, check with your main dealer.
Tyre speed rating codes
|Speed rating||Top speed|
For more advice on picking the right tyres for your car, read our full guide to the best all-season tyres you can buy.
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