255 is the tyre width in millimetres, 45 is the aspect ratio (sidewall height as a percentage of the width), R means radial construction, and 22 is the wheel diameter in inches. The full marking helps ensure you buy a tyre that matches your wheel and your vehicle specification.
Use the vehicle placard (door shut or fuel flap) or handbook to confirm the required load index and speed rating, then choose 255/45 R22 tyres that meet or exceed those figures. Many vehicles using this size need higher load ratings, so XL (Extra Load) versions are common. Avoid fitting a lower load index or speed rating than the manufacturer specifies.
For best handling and braking, fit the same tyre pattern on each axle, and ideally the same pattern on all four wheels. On 4x4 and AWD vehicles, keeping matching tyres and similar tread depths helps reduce drivetrain stress and traction control intervention. If you only replace two, fit the new 255/45 R22 tyres as a pair and follow your vehicle maker’s guidance on whether they should go on the front or rear.
Yes, but availability can be more limited than smaller wheel sizes, so it is worth comparing early. For winter-capable choices, look for the 3PMSF symbol, which indicates tested snow performance. All-season tyres can suit UK conditions if you want one set year-round, while dedicated winter tyres are best if you regularly drive in colder regions or on untreated roads.
The wheel diameter must be 22 inches, but you also need the correct rim width range and enough clearance inside the wheel arch. If you are changing from a different size, check overall diameter, load rating, and potential rubbing on full lock or under compression. When in doubt, confirm the approved sizes for your exact model and trim before ordering.
