How to find your tyre size

It's printed on the side of every tyre. Here's how to read it — or skip all of it and put your registration in.

Reading the sidewall

What 205/55 R16 91V means

1Width 205The tyre's width in millimetres, sidewall to sidewall.
2Profile 55The sidewall's height as a percentage of the width — here 55% of 205mm.
3Construction RR for radial, which almost every car tyre is.
4Rim size 16The diameter of the wheel it fits, in inches.
5Load index 91The weight each tyre can carry — 91 means 615kg.
6Speed rating VThe top speed the tyre is built for — V is 149mph.

Where to look

01
On the tyre
The size is moulded into the sidewall, usually in the largest characters.
02
In the door frame
Most cars have a sticker on the driver's door frame with the sizes and pressures.
03
In the handbook
The owner's handbook lists every size the car was approved with. Some cars show it inside the fuel flap too.

Front and rear sizes can differ — check each axle, or let your reg do it.

Other markings

XL: Extra loadA reinforced tyre with a higher load index than the standard one in that size.
RF: Run-flatMarked RF, RFT, ROF, SSR or ZP: built to keep going a short way after a puncture.
M+S: Mud and snowWith the mountain-snowflake symbol, a tyre tested for winter conditions.
DOT: Date codeThe last four digits are the week and year it was made: 2423 is week 24 of 2023.

Replacement tyres should match or exceed the load index and speed rating your car was approved with.

We'll look up the sizes your car takes and show you the tyres that fit, priced with fitting.