29.4" tall, 8.9" wide, 6.2" sidewall
A 225/70R17 tire is 29.4 inches (747 mm) tall and 8.9 inches wide. The sidewall is 70% of the width, 6.2 inches, on a 17-inch wheel, and the tire turns about 686 times per mile.
In flotation terms that is about 29.4x8.9R17. People often call it a 29-inch tire.
The size most often compared with it is 235/70R17, which is 0.6" taller (+1.9%). At an indicated 60 mph you would be doing 61.1 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 17" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 225/70R17 | |
|---|---|---|---|---|---|
| 235/70R17 | 30.0" | 9.3" | 6.5" | +1.9% | |
| 245/60R17 | 28.6" | 9.6" | 5.8" | −2.8% | |
| 225/75R17 | 30.3" | 8.9" | 6.6" | +3.0% | |
| 245/70R17 | 30.5" | 9.6" | 6.8" | +3.7% | |
| 225/80R17 | 31.2" | 8.9" | 7.1" | +6.0% | |
| 205/65R17 | 27.5" | 8.1" | 5.2" | −6.5% | |
| 245/75R17 | 31.5" | 9.6" | 7.2" | +7.0% | |
| 235/80R17 | 31.8" | 9.3" | 7.4" | +8.2% | |
| 205/60R17 | 26.7" | 8.1" | 4.8" | −9.2% | |
| 245/80R17 | 32.4" | 9.6" | 7.7" | +10.3% |
Sizes within 2% of 29.4" on 16" or 15" or 18" wheels.
| Size | Diameter | Width | Sidewall | vs 225/70R17 | |
|---|---|---|---|---|---|
| 285/60R16 | 29.5" | 11.2" | 6.7" | +0.2% | |
| 245/75R15 | 29.5" | 9.6" | 7.2" | +0.2% | |
| 265/55R18 | 29.5" | 10.4" | 5.7" | +0.3% | |
| 245/70R16 | 29.5" | 9.6" | 6.8" | +0.3% | |
| 225/75R16 | 29.3" | 8.9" | 6.6" | −0.4% | |
| 215/80R16 | 29.5" | 8.5" | 6.8" | +0.5% |
Actual speed when the speedometer is calibrated for 225/70R17.
| Speedometer shows | on 235/70R17 | on 245/60R17 | on 225/75R17 |
|---|---|---|---|
| 30 mph | 30.6 mph | 29.2 mph | 30.9 mph |
| 45 mph | 45.8 mph | 43.7 mph | 46.4 mph |
| 60 mph | 61.1 mph | 58.3 mph | 61.8 mph |
| 70 mph | 71.3 mph | 68.0 mph | 72.1 mph |
29.4 inches (747 mm). The sidewall is 6.2 inches.
8.9 inches (225 mm) section width, measured sidewall to sidewall.
About 29.4x8.9R17.
235/70R17 is +1.9% in diameter, within the common 3% guideline. It is 0.4" wider.