34.3" tall, 11.6" wide, 8.1" sidewall
A 295/70R18 tire is 34.3 inches (870 mm) tall and 11.6 inches wide. The sidewall is 70% of the width, 8.1 inches, on a 18-inch wheel, and the tire turns about 589 times per mile.
In flotation terms that is about 34.3x11.6R18. People often call it a 34-inch tire.
The size most often compared with it is 285/75R18, which is 0.6" taller (+1.7%). At an indicated 60 mph you would be doing 61.0 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 18" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 295/70R18 | |
|---|---|---|---|---|---|
| 275/75R18 | 34.2" | 10.8" | 8.1" | −0.1% | |
| 315/65R18 | 34.1" | 12.4" | 8.1" | −0.4% | |
| 285/70R18 | 33.7" | 11.2" | 7.9" | −1.6% | compare |
| 305/70R18 | 34.8" | 12.0" | 8.4" | +1.6% | compare |
| 285/75R18 | 34.8" | 11.2" | 8.4" | +1.7% | compare |
| 305/65R18 | 33.6" | 12.0" | 7.8" | −1.9% | |
| 275/80R18 | 35.3" | 10.8" | 8.7" | +3.1% | |
| 275/70R18 | 33.2" | 10.8" | 7.6" | −3.2% | compare |
| 315/70R18 | 35.4" | 12.4" | 8.7" | +3.2% | |
| 295/75R18 | 35.4" | 11.6" | 8.7" | +3.4% |
Sizes within 2% of 34.3" on 17" or 16" or 20" wheels.
| Size | Diameter | Width | Sidewall | vs 295/70R18 | |
|---|---|---|---|---|---|
| 275/80R17 | 34.3" | 10.8" | 8.7" | +0.2% | |
| 315/70R17 | 34.4" | 12.4" | 8.7" | +0.3% | |
| 275/85R16 | 34.4" | 10.8" | 9.2" | +0.4% | |
| 305/60R20 | 34.4" | 12.0" | 7.2" | +0.4% | |
| 295/75R17 | 34.4" | 11.6" | 8.7" | +0.5% | |
| 275/65R20 | 34.1" | 10.8" | 7.0" | −0.5% |
Actual speed when the speedometer is calibrated for 295/70R18.
| Speedometer shows | on 285/75R18 | on 295/70R17 | on 275/70R18 |
|---|---|---|---|
| 30 mph | 30.5 mph | 29.1 mph | 29.0 mph |
| 45 mph | 45.7 mph | 43.7 mph | 43.6 mph |
| 60 mph | 61.0 mph | 58.2 mph | 58.1 mph |
| 70 mph | 71.2 mph | 68.0 mph | 67.7 mph |
34.3 inches (870 mm). The sidewall is 8.1 inches.
11.6 inches (295 mm) section width, measured sidewall to sidewall.
About 34.3x11.6R18.
285/75R18 is +1.7% in diameter, within the common 3% guideline. It is 0.4" narrower.