205/55 R16 is one of the most common tyre sizes on UK roads, fitted to a huge number of family hatchbacks and saloons. It describes a tyre 205mm wide, with a sidewall 55% of that width, of radial construction, built to fit a 16-inch wheel.
Breaking down 205/55 R16
Each part of the size has a fixed meaning:
| Part | Value | Meaning |
|---|---|---|
| 205 | Width | 205mm nominal section width |
| 55 | Profile | Sidewall is 55% of the width |
| R | Construction | Radial |
| 16 | Wheel | Fits a 16-inch wheel |
So the tyre measures 205mm across the tread, has a sidewall 55% as tall as it is wide, uses standard radial construction and mounts on a 16-inch wheel.
The 205: width
The 205 is the section width in millimetres, the distance across the widest part of the tyre. At 205mm, it sits in the middle of the range for family cars, wide enough for stable grip without the fuel and noise penalty of a much wider tyre.
The 55: profile
The 55 is the profile, or aspect ratio. It is not 55 millimetres; it is the sidewall height as a percentage of the width. With a 205 width, a 55 profile gives a sidewall of roughly 113mm (55% of 205). This middling profile balances ride comfort against handling, which is why it is so common on everyday cars.
The R: radial construction
The R confirms radial construction, the standard for modern car tyres. It refers to how the reinforcing plies are arranged inside the tyre, and on a passenger car it is almost always present.
The 16: wheel diameter
The 16 is the diameter of the wheel the tyre fits, in inches. A 205/55 R16 mounts only on a 16-inch wheel; it cannot be fitted to a 15 or 17-inch wheel.
What usually follows: 91V
In practice this size is rarely seen on its own. It is normally written in full, for example 205/55 R16 91V, where the 91 is the load index (615kg per tyre) and the V is the speed rating (149mph), a pairing explained in full here. These set the tyre's safe weight and speed limits, and a replacement should match or exceed the car maker's figures rather than fall below them. Because it is such a common size, the choice is wide.
Cars that commonly use 205/55 R16
Because it suits a typical family car footprint, this size appears as standard or optional fitment on many popular models, including versions of the Volkswagen Golf, Audi A3, BMW 1 Series, Ford Focus, Mercedes A-Class and Vauxhall Astra. Fitment varies by trim and wheel choice, so the placard inside the driver's door is the reliable confirmation for any individual car. Because it is such a common size, it comes in a wide choice of tyres; entering 205/55 R16 on a tyre site like Tyres.co.uk brings up that full range, from budget to premium.
The same size can appear in several versions
You may see different load indices, speed symbols, seasonal types and construction markings beside 205/55 R16. Those versions are not automatically interchangeable. Read the full service description on the approved specification and check whether the vehicle requires extra-load, run-flat or a particular approval. The nominal sidewall height is 112.75mm, but that calculation helps explain the size; it does not tell you which vehicle the tyre is suitable for.
Common questions
What does 205/55 R16 mean?+
It is a tyre size. 205 is the nominal section width in millimetres, 55 is the sidewall height as a percentage of that width, R is radial construction and 16 is the wheel diameter in inches. Any load index and speed rating, such as 91V, follow the size.
What car uses 205/55 R16 tyres?+
It is one of the most common car tyre sizes in the UK, fitted to many family hatchbacks and saloons such as the VW Golf, Audi A3, BMW 1 Series and Ford Focus, depending on trim. The door placard confirms the correct size for a specific car.
Is 205/55 R16 the same as 205/55 R16 91V?+
The size is identical. The 91V on the end adds the load index (91, meaning 615kg) and speed rating (V, meaning 149mph), which set the tyre's weight and speed limits. A replacement should keep these at or above the car maker's figures.
Can I fit a different size instead of 205/55 R16?+
Only within careful limits. Any alternative must keep a similar overall diameter and meet the car's load and speed requirements, or the speedometer reads wrong and handling suffers. The recommended size on the door placard is the safe choice.