H, V, W, Y — the speed rating on your tyre affects more than just top speed capability. Here's why it matters for safety and insurance.
The letter at the end of your tyre specification — T, H, V, W, or Y — is the speed rating. It indicates the maximum sustained speed the tyre is designed to handle safely. This might seem academic in the UK, where the maximum legal speed is 70mph — but the speed rating matters more than you might think.
What the Ratings Mean
- T: 118mph (190 km/h) — typical for economy cars
- H: 130mph (210 km/h) — common on mainstream cars
- V: 149mph (240 km/h) — standard on most modern saloons and crossovers
- W: 168mph (270 km/h) — performance cars
- Y: 186mph (300 km/h) — sports cars
- Z: Above 149mph — older rating, now supplemented by W and Y
Why It Matters at UK Speeds
Speed ratings aren't just about top speed capability — they're an indicator of the tyre's overall construction quality and heat-management capability. A V-rated tyre runs cooler at sustained motorway speeds than an equivalent T-rated tyre. It handles more consistently in emergency manoeuvres. These characteristics matter at 70mph as much as at 140mph.
Insurance Implications
Fitting a tyre with a lower speed rating than your vehicle specifies may void your insurance in the event of an accident. It's treated as a modification to the vehicle from its manufacturer specification.
Always Match or Exceed the Manufacturer's Rating
When booking mobile tyre fitting, always use the speed rating specified for your vehicle. Our team will confirm this from your registration when you book — we never fit a lower-rated tyre without explicit consent.
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