35.2" tall, 12.8" wide, 9.6" sidewall
A 325/75R16 tire is 35.2 inches (894 mm) tall and 12.8 inches wide. The sidewall is 75% of the width, 9.6 inches, on a 16-inch wheel, and the tire turns about 573 times per mile.
In flotation terms that is about 35.2x12.8R16. People often call it a 35-inch tire.
The size most often compared with it is 315/75R16, which is 0.6" shorter (−1.7%). At an indicated 60 mph you would be doing 59.0 mph on it.
| 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 325/75R16 | |
|---|---|---|---|---|---|
| 315/75R16 | 34.6" | 12.4" | 9.3" | −1.7% | |
| 315/80R16 | 35.8" | 12.4" | 9.9" | +1.8% | |
| 305/75R16 | 34.0" | 12.0" | 9.0" | −3.4% | |
| 325/80R16 | 36.5" | 12.8" | 10.2" | +3.6% | |
| 315/70R16 | 33.4" | 12.4" | 8.7" | −5.2% | |
| 33x12.50R16 | 33.0" | 12.5" | 8.5" | −6.2% | |
| 305/70R16 | 32.8" | 12.0" | 8.4" | −6.8% |
Sizes within 2% of 35.2" on 18" or 17" or 15" wheels.
| Size | Diameter | Width | Sidewall | vs 325/75R16 | |
|---|---|---|---|---|---|
| 275/80R18 | 35.3" | 10.8" | 8.7" | +0.4% | |
| 315/70R18 | 35.4" | 12.4" | 8.7" | +0.5% | |
| 305/75R17 | 35.0" | 12.0" | 9.0" | −0.5% | |
| 35x11.50R17 | 35.0" | 11.5" | 9.0" | −0.5% | |
| 35x12.50R15 | 35.0" | 12.5" | 10.0" | −0.5% | |
| 35x12.50R17 | 35.0" | 12.5" | 9.0" | −0.5% |
Actual speed when the speedometer is calibrated for 325/75R16.
| Speedometer shows | on 315/75R16 | on 315/80R16 | on 305/75R16 |
|---|---|---|---|
| 30 mph | 29.5 mph | 30.6 mph | 29.0 mph |
| 45 mph | 44.2 mph | 45.8 mph | 43.5 mph |
| 60 mph | 59.0 mph | 61.1 mph | 58.0 mph |
| 70 mph | 68.8 mph | 71.3 mph | 67.7 mph |
35.2 inches (894 mm). The sidewall is 9.6 inches.
12.8 inches (325 mm) section width, measured sidewall to sidewall.
About 35.2x12.8R16.
315/75R16 is −1.7% in diameter, within the common 3% guideline. It is 0.4" narrower.