24.4" tall, 9.3" wide, 3.7" sidewall
A 235/40R17 tire is 24.4 inches (620 mm) tall and 9.3 inches wide. The sidewall is 40% of the width, 3.7 inches, on a 17-inch wheel, and the tire turns about 827 times per mile.
In flotation terms that is about 24.4x9.3R17. People often call it a 24-inch tire.
The size most often compared with it is 245/40R17, which is 0.3" taller (+1.3%). At an indicated 60 mph you would be doing 60.8 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 235/40R17 | |
|---|---|---|---|---|---|
| 245/40R17 | 24.7" | 9.6" | 3.9" | +1.3% | compare |
| 255/40R17 | 25.0" | 10.0" | 4.0" | +2.6% | |
| 255/45R17 | 26.0" | 10.0" | 4.5" | +6.7% |
Sizes within 2% of 24.4" on 16" or 18" or 15" wheels.
| Size | Diameter | Width | Sidewall | vs 235/40R17 | |
|---|---|---|---|---|---|
| 215/50R16 | 24.5" | 8.5" | 4.2" | +0.3% | |
| 275/30R18 | 24.5" | 10.8" | 3.2" | +0.4% | |
| 205/50R16 | 24.1" | 8.1" | 4.0" | −1.4% | |
| 285/30R18 | 24.7" | 11.2" | 3.4" | +1.4% | |
| 175/65R15 | 24.0" | 6.9" | 4.5" | −1.8% | |
| 225/50R16 | 24.9" | 8.9" | 4.4" | +1.9% |
Actual speed when the speedometer is calibrated for 235/40R17.
| Speedometer shows | on 245/40R17 | on 255/40R17 | on 255/45R17 |
|---|---|---|---|
| 30 mph | 30.4 mph | 30.8 mph | 32.0 mph |
| 45 mph | 45.6 mph | 46.2 mph | 48.0 mph |
| 60 mph | 60.8 mph | 61.5 mph | 64.0 mph |
| 70 mph | 70.9 mph | 71.8 mph | 74.7 mph |
24.4 inches (620 mm). The sidewall is 3.7 inches.
9.3 inches (235 mm) section width, measured sidewall to sidewall.
About 24.4x9.3R17.
245/40R17 is +1.3% in diameter, within the common 3% guideline. It is 0.4" wider.