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Find My Tyre Size: A Simple Guide to Reading Tyre Markings

Where to Find Your Tyre Size

You don’t need any special tools to find your tyre size. It is permanently printed on your vehicle in a few accessible locations:

  • The Tyre Sidewall: Look at the outer side of your current tyres. You will see a string of numbers and letters raised against the rubber (e.g., 205/55 R16 91V).
  • The Driver’s Door Jamb: Open the driver’s door and look at the frame or edge of the door for a printed sticker. This placard lists the factory-recommended tyre sizes and correct tyre pressures.
  • Your Vehicle Handbook: Inside your glovebox, the manufacturer manual contains a technical specification section listing all approved tyre profiles for your exact model.
Find My Tyre Size

How to Read Your Tyre Markings

A typical tyre size looks like this: 205 / 55 R16 91V. Here is exactly what those numbers mean to a tyre technician:

  • Width (e.g. 205): The width of the tyre in millimetres from sidewall to sidewall.
  • Aspect Ratio (e.g. 55): The height of the tyre sidewall, expressed as a percentage of the width.
  • Construction (e.g. R): Stands for ‘Radial’, which is the standard industry method for manufacturing modern car tyres.
  • Diameter (e.g. 16): The diameter of the inner wheel rim measured in inches.
  • Load Index (e.g. 91): A numerical code indicating the maximum weight capacity the tyre can safely carry.
  • Speed Rating (e.g. V): A letter code indicating the maximum safe speed capability of the tyre under full load.
Tyre Sizes

Need Help Finding the Right Tyres?

If the markings on your sidewall are worn away or you aren’t completely sure which speed rating your vehicle requires, our local technicians are here to help.

Call our St Neots workshop directly to get a transparent, competitive quote on premium and budget tyre brands.

A tyre in bad condition in St Neots

Frequently Asked Questions (FAQs)

Tyres should be replaced when the tread depth is approaching the legal minimum of 1.6mm, if there is uneven wear, visible damage, bulges, or cracks in the sidewall.

The legal minimum tread depth for cars in the UK is 1.6mm across the central three-quarters of the tyre and around the entire circumference. For safety, many drivers choose to replace tyres before reaching this limit.

Your tyre size is printed on the sidewall of your current tyre. For example, 205/55 R16 91V. If you’re unsure, contact Prestige Auto Solutions with your registration number and we’ll help identify the correct tyres for your vehicle.

Wheel alignment should be checked at least once a year, after hitting a pothole or kerb, or if you notice the vehicle pulling to one side or uneven tyre wear.

Common signs include uneven tyre wear, a steering wheel that sits off-centre, the vehicle pulling left or right, and reduced fuel efficiency.

Yes, we can source and fit tyres for most vehicle makes and models, offering options to suit different budgets and driving requirements.

Yes. Wheel balancing helps ensure a smooth ride, reduces vibration, and prevents premature tyre wear. New tyres should always be balanced when fitted.

Same-day tyre fitting is often available depending on tyre stock and workshop availability. Contact us for current availability and pricing.

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