What Is Speed Rating?

When buying replacement tyres, you will notice a letter printed at the end of the tyre size code, such as 91V or 94H. Many drivers overlook this detail, but it plays a crucial role in your vehicle’s safety and performance. This letter represents the tyre’s speed rating.

At Roadside Tyres 24hr Ltd, we provide professional mobile tyre services across Gloucester, Cheltenham, Stroud, Cirencester, Coleford, and Tewkesbury. As a fully mobile tyre fitting service with no fixed garage, we regularly explain tyre specifications during on-site fittings. Understanding speed rating helps ensure you choose the correct tyres for your vehicle.

What Does Speed Rating Mean?

The speed rating indicates the maximum speed at which a tyre can safely operate under its recommended load capacity. Tyre manufacturers determine this rating through controlled testing, and it is represented by a letter.

Common speed ratings include:

• T – Up to 118 mph
• H – Up to 130 mph
• V – Up to 149 mph
• W – Up to 168 mph
• Y – Up to 186 mph

It’s important to understand that the speed rating does not mean you should drive at those speeds. Instead, it reflects the tyre’s ability to maintain performance, stability, and heat resistance when operating at higher speeds if required.

Why Is Speed Rating Important?

Choosing the correct speed rating ensures:

• Proper vehicle handling
• Safe braking performance
• Stability at motorway speeds
• Compliance with manufacturer specifications

Using tyres with a lower speed rating than recommended can compromise safety and may even invalidate your insurance. Fitting tyres with a higher speed rating is generally acceptable, although it may slightly affect ride comfort and cost.

At Roadside Tyres 24hr Ltd, we always verify your vehicle manufacturer’s recommended specification before fitting new tyres.

Where Can You Find the Speed Rating?

The speed rating is printed on the tyre sidewall as the final letter in the size code.

Example:
225/45 R17 94W

• 225 = Tyre width
• 45 = Aspect ratio
• R17 = Wheel diameter
• 94 = Load index
• W = Speed rating

If you’re unsure how to interpret your tyre markings, our technicians are happy to assist during your mobile fitting appointment.

Is Speed Rating Relevant for Everyday Driving?

Yes. Even if you never drive at high speeds, speed rating influences:

• Cornering stability
• Heat resistance
• Overall tyre construction

Higher speed-rated tyres are built with stronger internal materials to withstand increased heat and stress. For drivers travelling across Gloucester, Cheltenham, Stroud, Cirencester, Coleford, and Tewkesbury — particularly on motorways and dual carriageways — the correct speed rating is essential for safety and long-term performance.

What Happens If You Fit the Wrong Speed Rating?

Incorrect speed ratings can lead to:

• Poor handling and reduced stability
• Premature tyre wear
• Insurance complications
• Increased risk during emergency braking

We stock a wide range of major tyre brands and ensure the correct specification is fitted every time — whether you require a single replacement tyre, a full set, or a winter and summer tyre swap.

Expert Advice — Delivered to Your Door

Because we operate fully equipped mobile fitting vans only, there’s no need to travel to a garage. We bring professional tyre advice and fitting directly to your home, workplace, or roadside location.

Our services include:

• Mobile Tyre Support
• 24hr Emergency Service
• Recovery & Towing Services
• Replacement of all major tyre brands
• Seasonal tyre changes

If you have questions about your tyre’s speed rating or need urgent tyre replacement, we are available 24 hours a day.

Do You Need Expert Tyre Assistance?

📍 Servicing: Gloucester, Cheltenham, Stroud, Cirencester, Coleford & Tewkesbury
📞 Call: 07460 414293
📧 Email: roadside@mobiletyrefitting24hr.co.uk

Roadside Tyres 24hr Ltd — Safe, reliable mobile tyre fitting with expert advice, wherever you are.