Confirm 265/45 R21 by checking the tyre sidewall, then cross-check the vehicle handbook or the tyre label inside the driver door area. The width (265), profile (45) and rim diameter (R21) must all match, and any approved alternative sizes should come from the manufacturer. If your car uses staggered sizes, check front and rear tyres separately before ordering.
Choose a 265/45 R21 tyre with the same load index and speed rating as currently fitted, or the exact specification listed by the vehicle manufacturer. Dropping below the required rating can affect safety, insurance and MOT compliance. For many SUV fitments in this size, higher load ratings are common, so consider XL only if it matches your vehicle requirements.
Many 265/45 R21 ranges include XL (extra load) options, and some lines are available as run-flat or with acoustic foam, depending on brand and pattern. Run-flat tyres should only be chosen if your vehicle is designed for them or you are following manufacturer guidance, as ride and handling characteristics can differ. Use filters to narrow to the exact markings you need before checkout.
For 265/45 R21, summer tyres suit mainly mild conditions and higher temperatures, winter tyres are best for regular cold weather and frequent snow or ice, and all-season tyres work well for mixed UK driving where temperatures vary. If you travel in winter conditions, look for the 3PMSF marking on winter and many all-season options. Matching the tyre type across the same axle helps keep braking and grip consistent.
You can replace a single 265/45 R21 tyre if the other tyre on the same axle is very close in tread depth and the same size and specification, but fitting a pair is usually the better choice for balanced grip and braking. On AWD vehicles, larger tread depth differences can put extra strain on the drivetrain, so check your handbook guidance. If you do replace one, match the brand, pattern and ratings as closely as possible.
