Tire sizes / 245/40R21
245/40R21 Tire Size
245/40R21
- 245: tread width of 245 mm (9.6 in)
- 40: sidewall height is 40% of the width, about 98 mm
- R: radial construction
- 21: fits a 21-inch wheel
Dimensions
| Overall diameter | 28.7 in (729 mm) |
|---|---|
| Section width | 9.6 in (245 mm) |
| Sidewall height | 3.9 in (98 mm) |
| Wheel diameter | 21 in |
| Revolutions per mile | about 702 |
Nominal figures calculated from the size code. Real tires vary a little by brand and tread depth.
Cars that came with 245/40R21 tires
Factory fitment only, from owner's manuals. Many other cars can run this size; check with a tire shop before changing size.