Identify the wheel before copying the size
Describe the affected position clearly: front or rear, and left or right as viewed from the driver’s seat. A photograph can help the booking team connect the wheel with its sidewall marking. If more than one tyre is being replaced, give the information for each axle rather than assuming that a single size describes the whole car.
Registration information can help identify the vehicle, but it should not replace checking what is fitted and what the manufacturer approves. Mention aftermarket wheels, a previous wheel change or uncertainty about an existing tyre. If the current arrangement might be incorrect, copying it without a specification check risks carrying the same uncertainty into the replacement order.
Treat the approved combination as part of the specification
Continental notes that some vehicles are supplied with different front and rear sizes and that this approved configuration should be preserved. Its guidance also highlights the importance of manufacturer requirements for four-wheel-drive vehicles. A tyre with the same rim diameter alone does not establish that it is an appropriate substitute for the tyre needed at a particular wheel.
Give the team any handbook or vehicle-label information that explains the fitment, together with the markings on the tyres. If you want to change the tyre type or replace only part of a set, discuss that before booking the product. The fitter needs enough information to assess compatibility rather than being asked to make an unapproved combination work on arrival.
Confirm the product and quantity for each axle
A request for two tyres can mean two matching tyres on one axle or one tyre at each end of the car. Spell out which arrangement you need. Ask the team to confirm the quoted specification and availability for every replacement. If the correct tyre cannot be confirmed, discuss a suitable plan rather than choosing a nearby size from search results.
Use our tyre replacement service with the wheel positions, photographs and vehicle details ready. A confirmed replacement quote includes the quoted tyres and fitting for the agreed job. Keep the booking confirmation and contact the team if the axle, quantity or vehicle changes. This extra care matters most when several similar sizes appear possible but only a particular arrangement is approved.
Before you book
- Identify the affected wheel from the driver’s perspective.
- Send front and rear markings where sizes differ.
- Mention wheel modifications and specification uncertainty.
- Confirm the product and quantity for each axle.
Your tyres, taken care of.
Choose a visit that fits your day. Share your vehicle and location, and we’ll confirm the right tyre, appointment and full quote.
Your questions, answered.
Can I use the front tyre size when replacing a rear tyre?
Only if it is the correct approved size for that rear fitment. Some vehicles use different front and rear sizes, so identify the affected axle first.
Does the same rim diameter make two tyres interchangeable?
No. The complete fitment and vehicle requirements need checking. Ask the team to confirm an appropriate replacement rather than substituting a similar size.
Useful sources
For further information, explore these sources.