255/35 R18 tyre size explained
A 255/35 R18 marking describes dimensions, not whether a tyre is right for your vehicle or currently available to buy. Confirm the manufacturer-approved fitment and load and speed ratings before fitting.
- Width
- 255 mm
- Profile
- 35%
- Rim
- 18 inches
Nominal tyre section width
Sidewall approximately 89 mm
Approximate overall diameter 635 mm
Calculated measurements are approximate; actual dimensions vary between tyre designs. A marking on its own does not confirm vehicle compatibility.