Tire sizes / 215/40R18
215/40R18 Tire Size
215/40R18
- 215: tread width of 215 mm (8.5 in)
- 40: sidewall height is 40% of the width, about 86 mm
- R: radial construction
- 18: fits a 18-inch wheel
Dimensions
| Overall diameter | 24.8 in (629 mm) |
|---|---|
| Section width | 8.5 in (215 mm) |
| Sidewall height | 3.4 in (86 mm) |
| Wheel diameter | 18 in |
| Revolutions per mile | about 814 |
Nominal figures calculated from the size code. Real tires vary a little by brand and tread depth.
Cars that came with 215/40R18 tires
Factory fitment only, from owner's manuals. Many other cars can run this size; check with a tire shop before changing size.