Match the size exactly to your current tyre sidewall and confirm it against your vehicle’s door placard or handbook. If 245/55 R17 is listed, stick with it unless your manufacturer also approves an alternative size for your wheel and suspension setup.
Choose a load index and speed rating that meet or exceed the figures shown on your door placard or handbook. Many 245/55 R17 fitments use higher load ratings because the size is common on heavier vehicles, so selecting the correct rating helps maintain safe carrying capacity and stable handling.
XL (Extra Load) versions are built to carry more weight at higher pressures, which can suit SUVs or cars specified with an XL requirement. If your vehicle calls for XL, fit XL; if it does not, you can still choose XL, but always inflate to the pressures shown for your car, not the maximum on the tyre.
Summer tyres prioritise wet braking and stability in milder temperatures, winter tyres perform best once temperatures regularly drop below about 7°C, and all-season tyres aim to cover both with one set. For year-round convenience, look for all-season tyres with the 3PMSF marking if you want added cold-weather capability.
For many AWD systems, keeping tread depths closely matched across all wheels helps reduce drivetrain strain and uneven wear. If the remaining tyres are noticeably more worn, replacing all four is often the safer choice; otherwise, replace in pairs on the same axle and ensure both new tyres match in make, pattern, and specification.
