Tire sizes / 225/55R18
225/55R18 Tire Size
225/55R18
- 225: tread width of 225 mm (8.9 in)
- 55: sidewall height is 55% of the width, about 124 mm
- R: radial construction
- 18: fits a 18-inch wheel
Dimensions
| Overall diameter | 27.7 in (705 mm) |
|---|---|
| Section width | 8.9 in (225 mm) |
| Sidewall height | 4.9 in (124 mm) |
| Wheel diameter | 18 in |
| Revolutions per mile | about 727 |
Nominal figures calculated from the size code. Real tires vary a little by brand and tread depth.
Cars that came with 225/55R18 tires
Factory fitment only, from owner's manuals. Many other cars can run this size; check with a tire shop before changing size.