Tire sizes / 235/40R18
235/40R18 Tire Size
235/40R18
- 235: tread width of 235 mm (9.3 in)
- 40: sidewall height is 40% of the width, about 94 mm
- R: radial construction
- 18: fits a 18-inch wheel
Dimensions
| Overall diameter | 25.4 in (645 mm) |
|---|---|
| Section width | 9.3 in (235 mm) |
| Sidewall height | 3.7 in (94 mm) |
| Wheel diameter | 18 in |
| Revolutions per mile | about 794 |
Nominal figures calculated from the size code. Real tires vary a little by brand and tread depth.
Cars that came with 235/40R18 tires
Factory fitment only, from owner's manuals. Many other cars can run this size; check with a tire shop before changing size.