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Find tyres for your car, near you.
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Your cars and the tyres on them, in one place. See what fits, what the label says, and when they went on. Free, no shop sees it.
- Add a car and its tyres
- Every tyre's specs and label, filled in for you
- Download or delete everything, any time
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TyreCalculator
Check my size
Your size is on the tyre's wall, like 205/55R16. Type it into the phone, or try the example.
Example Your own size's answer shows here when you check it.
205/55R16 91V
- 205Section width8.1 in from sidewall to sidewall — how wide the tyre is, not how wide the tread is.
- 55Aspect ratioThe sidewall is 55% of the width — about 4.4 in tall. A lower number is a shorter, stiffer sidewall.
- RConstructionR for radial — the plies run across the tyre. Almost every modern road tyre is radial; a dash instead means cross-ply.
- 16Rim diameterThe rim it fits, in inches. This one number has to match the wheel exactly — everything else can vary a little, this cannot.
- 91Load indexEach tyre carries up to 1,356 lb at 36 psi — 5,424 lb across four.
- VSpeed symbolRated up to 149 mph at its rated load.
| Across the tread | 8.1" |
|---|---|
| Sidewall, rim to tread | 4.4" |
| Rim | 16.0" |
| Overall diameter | 24.9" |
| One turn covers | 78.2" |
| Turns | 811 / mile |
What else fits
Other sizes for the same rim, each with its verdict.
Check your size above, and the sizes that also fit its rim appear here — each one marked as a safe swap or a caution.
How to read a tyre sidewall
An example — yours will differ, but it reads the same way. Touch any part of it.
Section width. 205 mm — about 8.1 in — from sidewall to sidewall: how wide the tyre is, not how wide the tread is.
Tyre labels explained
What the label on a new tyre tells you.
Three grades: how much fuel the tyre costs you, how well it stops in the wet, and how loud it is on the road. Read a tyre label, grade by grade →
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