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How to find your tyre size

It’s printed right on your tyre — a code like 205/55 R16 91V. Here’s how to read it, where to look, and what to tell us when you call so we bring the exact tyre to you.

A tyre sidewall showing the size code
Last updated: 20 June 2026
01

Where to look

Your tyre size is moulded into the sidewall — the outer face of the tyre. Look for a sequence of numbers and letters such as 205/55 R16 91V. You’ll also find it printed on a sticker inside the driver’s door frame, in the fuel-filler flap, or in your vehicle handbook.

Tip: you don’t need to get on the ground — on most cars the code is easy to read with the wheels straight. Or just send us a photo on WhatsApp and we’ll read it for you.

02

Reading the code

Take 205/55 R16 91V as an example — each part means something:

205
Width
The tyre’s width in millimetres, tread edge to tread edge.
55
Profile
The sidewall height as a percentage of the width (the “aspect ratio”).
R16
Rim
“R” means radial; 16 is the wheel diameter in inches.
91
Load index
The maximum weight the tyre can carry (91 = 615 kg).
V
Speed rating
The maximum rated speed (V = 149 mph). Always match or exceed your car’s spec.
03

Vans, performance & EVs

Some tyres carry extra markings — tell us if you see any and we’ll match them exactly:

C / CP — commercial vanXL — extra loadRFT / runflatN0, N1 (Porsche)MO (Mercedes)* (BMW)AO (Audi)EV / HL

These mark tyres approved for a specific vehicle or built for heavier loads, run-flat capability or EV-specific demands. Fitting the right one matters for safety and handling.

04

What to tell us

When you call or message, have ready:

Your tyre size (the full sidewall code)
How many tyres you need
Your vehicle make & model
Your location — home, work or roadside
Whether you have the locking wheel-nut key

With that, we confirm one fixed price up front and bring the exact tyre to you.

05

Not sure? We’ll help

Can’t find it or not sure you’re reading it right? No problem — send a photo of the sidewall on WhatsApp or just call us and we’ll identify the right tyre for your vehicle.

☎ 020 8965 0688WhatsApp a photo
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