It describes the tyre’s key dimensions and construction. 225 is the width in millimetres, 55 is the profile (sidewall height as a percentage of the width), R means radial construction, and 16 is the wheel rim diameter in inches. When buying, you also need the correct load index and speed rating shown after the size on the sidewall.
Check the size printed on your current tyre sidewall first, then confirm against the driver’s door jamb placard or the vehicle handbook. Some trims offer multiple approved sizes, so match what your car is set up for, including any notes about XL (Extra Load) or run-flat requirements. If the front and rear sizes differ, order the exact size used on each axle.
Use the load index and speed rating listed on the placard or handbook, and match them across both tyres on the same axle. You can choose a higher rating than specified, but not lower. Common markings you may see in this size include 95V and 99W XL, but your vehicle specification should be the deciding factor.
Only choose XL (Extra Load) if your car manufacturer specifies it or your current tyres are marked XL on the sidewall. XL versions are built to carry more load at higher pressures, which can suit heavier vehicles or certain suspension and wheel set-ups. If your car was designed for standard load tyres, stick with the specified type for the intended ride and handling balance.
They can be a strong choice if you want one set to cover wet weather, cooler temperatures and occasional snow without swapping tyres seasonally. Look for the 3PMSF symbol for proper winter performance testing, and compare braking and wet-grip ratings within the size. If you regularly drive in severe winter conditions, a dedicated winter tyre may still be the best match.
