34.6" tall, 12.4" wide, 9.3" sidewall
A 315/75R16 tire is 34.6 inches (879 mm) tall and 12.4 inches wide. The sidewall is 75% of the width, 9.3 inches, on a 16-inch wheel, and the tire turns about 583 times per mile.
In flotation terms that is about 34.6x12.4R16. People often call it a 35-inch tire.
The size most often compared with it is 305/70R16, which is 1.8" shorter (−5.2%). At an indicated 60 mph you would be doing 56.9 mph on it, more than the 3% change many shops use as a limit.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 16" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 315/75R16 | |
|---|---|---|---|---|---|
| 305/75R16 | 34.0" | 12.0" | 9.0" | −1.7% | compare |
| 325/75R16 | 35.2" | 12.8" | 9.6" | +1.7% | |
| 295/75R16 | 33.4" | 11.6" | 8.7" | −3.4% | compare |
| 315/70R16 | 33.4" | 12.4" | 8.7" | −3.6% | |
| 315/80R16 | 35.8" | 12.4" | 9.9" | +3.6% | |
| 33x12.50R16 | 33.0" | 12.5" | 8.5" | −4.6% | |
| 305/70R16 | 32.8" | 12.0" | 8.4" | −5.2% | compare |
| 325/80R16 | 36.5" | 12.8" | 10.2" | +5.4% | |
| 295/70R16 | 32.3" | 11.6" | 8.1" | −6.8% |
Sizes within 2% of 34.6" on 18" or 17" wheels.
| Size | Diameter | Width | Sidewall | vs 315/75R16 | |
|---|---|---|---|---|---|
| 325/65R18 | 34.6" | 12.8" | 8.3" | +0.1% | |
| 265/80R18 | 34.7" | 10.4" | 8.3" | +0.3% | |
| 265/85R17 | 34.7" | 10.4" | 8.9" | +0.4% | |
| 295/75R17 | 34.4" | 11.6" | 8.7" | −0.5% | |
| 305/70R18 | 34.8" | 12.0" | 8.4" | +0.6% | |
| 285/75R18 | 34.8" | 11.2" | 8.4" | +0.7% |
Actual speed when the speedometer is calibrated for 315/75R16.
| Speedometer shows | on 305/70R16 | on 295/75R16 | on 305/75R16 |
|---|---|---|---|
| 30 mph | 28.4 mph | 29.0 mph | 29.5 mph |
| 45 mph | 42.7 mph | 43.5 mph | 44.2 mph |
| 60 mph | 56.9 mph | 58.0 mph | 59.0 mph |
| 70 mph | 66.4 mph | 67.6 mph | 68.8 mph |
34.6 inches (879 mm). The sidewall is 9.3 inches.
12.4 inches (315 mm) section width, measured sidewall to sidewall.
About 34.6x12.4R16.
305/70R16 is −5.2% in diameter, more than the common 3% guideline, so expect a speedometer error and check clearance. It is 0.4" narrower.