255 is the tyre width in millimetres, 65 is the sidewall height as a percentage of the width, R means radial construction, and 17 is the wheel diameter in inches. Confirm the size by checking the tyre sidewall and comparing it with your door-jamb sticker or owner’s handbook. Also match the load index and speed rating listed for your vehicle, especially if it is a 4x4 or used for towing.
Start with the exact load index and speed rating specified by your vehicle manufacturer, then choose the same or higher ratings when ordering. Many vehicles that use 255/65 R17 require higher load capacity, so look out for XL (extra load) or reinforced versions if your handbook specifies them. Avoid dropping to a lower load or speed rating, as that can affect safety, insurance and MOT compliance.
All-terrain patterns can be a strong choice if you split time between tarmac, gravel tracks and muddy access roads, as they typically offer more bite and tougher construction than road tyres. The trade-off can be extra road noise and slightly higher rolling resistance compared with highway-focused designs. If you drive year-round and see winter conditions, consider an all-terrain option with the 3PMSF marking for improved cold-weather performance.
It is best to fit the same brand, model and tread pattern on the same axle, and ideally replace in pairs to keep handling predictable. Mixing patterns (for example, a road tyre with an all-terrain) can change braking and grip balance, particularly in wet conditions. If your vehicle has 4-wheel drive, mismatched rolling circumference can also place extra strain on the drivetrain, so matching specifications matters.
Sometimes, but it needs checking carefully because a different size can alter rolling radius, speedometer accuracy, ground clearance and wheel arch clearance. It must also be compatible with your wheel width and the manufacturer-approved fitments for your exact model and trim. If you are considering an alternative, compare dimensions first and confirm suitability with a qualified fitter before ordering.
