Check the tyre placard on the door jamb or fuel flap, or confirm the size in your handbook before ordering 255/40 R22. The sidewall of your current tyres can also be used to verify the size, but only if the wheels are the correct factory or approved fitment. If your vehicle lists multiple approved sizes, match the exact size specified for your wheel and trim.
Use the vehicle placard to match the required load index and speed rating when selecting 255/40 R22. For heavier SUVs, an XL (extra load) version is often specified, so do not downgrade if your current tyres are marked XL. If you are unsure, keep the same ratings as fitted now or choose an approved equivalent listed by the manufacturer.
Summer 255/40 R22 tyres suit warmer months and are typically chosen for sharper handling and braking on dry and wet roads. Winter tyres are designed for colder conditions and are most effective when temperatures regularly drop below about 7 degrees C. All-season options can be a practical year-round choice if you want one set for mixed UK weather without seasonal changes.
Choose 255/40 R22 XL if your vehicle placard specifies extra load, as it is designed to carry higher weights at the correct pressures. Only pick run-flat if your vehicle is approved for it and you are happy with the ride characteristics, because switching between run-flat and non run-flat can change comfort and handling. If your car has no spare and relies on run-flat, stick with the same technology unless the manufacturer states otherwise.
Replacing two 255/40 R22 tyres is usually fine if the other two have even wear and sufficient tread, but fit the new pair on the rear unless your vehicle maker advises differently. On AWD and 4x4 systems, keep tread depths closely matched across all wheels to reduce strain on the drivetrain. If the remaining tyres are significantly worn or uneven, replacing all four can be the most consistent option for grip and stability.
