25.7" tall, 12.4" wide, 4.3" sidewall
A 315/35R17 tire is 25.7 inches (652 mm) tall and 12.4 inches wide. The sidewall is 35% of the width, 4.3 inches, on a 17-inch wheel, and the tire turns about 785 times per mile.
In flotation terms that is about 25.7x12.4R17. People often call it a 26-inch tire.
The size most often compared with it is 275/40R17, which is 0.0" shorter (−0.1%). At an indicated 60 mph you would be doing 60.0 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 315/35R17 | |
|---|---|---|---|---|---|
| 295/40R17 | 26.3" | 11.6" | 4.6" | +2.4% | |
| 305/40R17 | 26.6" | 12.0" | 4.8" | +3.6% | |
| 325/45R17 | 28.5" | 12.8" | 5.8" | +11.0% |
Sizes within 2% of 25.7" on 16" or 15" or 18" wheels.
| Size | Diameter | Width | Sidewall | vs 315/35R17 | |
|---|---|---|---|---|---|
| 245/50R16 | 25.6" | 9.6" | 4.8" | −0.1% | |
| 225/60R15 | 25.6" | 8.9" | 5.3" | −0.2% | |
| 245/55R15 | 25.6" | 9.6" | 5.3" | −0.3% | |
| 275/35R18 | 25.6" | 10.8" | 3.8" | −0.4% | |
| 275/50R15 | 25.8" | 10.8" | 5.4" | +0.6% | |
| 285/35R18 | 25.9" | 11.2" | 3.9" | +0.7% |
Actual speed when the speedometer is calibrated for 315/35R17.
| Speedometer shows | on 275/40R17 | on 295/40R17 | on 305/40R17 |
|---|---|---|---|
| 30 mph | 30.0 mph | 30.7 mph | 31.1 mph |
| 45 mph | 45.0 mph | 46.1 mph | 46.6 mph |
| 60 mph | 60.0 mph | 61.4 mph | 62.2 mph |
| 70 mph | 69.9 mph | 71.7 mph | 72.5 mph |
25.7 inches (652 mm). The sidewall is 4.3 inches.
12.4 inches (315 mm) section width, measured sidewall to sidewall.
About 25.7x12.4R17.
275/40R17 is −0.1% in diameter, within the common 3% guideline. It is 1.6" narrower.