26.1" tall, 9.3" wide, 5.6" sidewall
A 235/60R15 tire is 26.1 inches (663 mm) tall and 9.3 inches wide. The sidewall is 60% of the width, 5.6 inches, on a 15-inch wheel, and the tire turns about 773 times per mile.
In flotation terms that is about 26.1x9.3R15. People often call it a 26-inch tire.
The size most often compared with it is 215/70R15, which is 0.7" taller (+2.9%). At an indicated 60 mph you would be doing 61.7 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 15" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 235/60R15 | |
|---|---|---|---|---|---|
| 255/55R15 | 26.0" | 10.0" | 5.5" | −0.2% | |
| 215/65R15 | 26.0" | 8.5" | 5.5" | −0.4% | |
| 245/60R15 | 26.6" | 9.6" | 5.8" | +1.8% | |
| 225/60R15 | 25.6" | 8.9" | 5.3" | −1.8% | |
| 245/55R15 | 25.6" | 9.6" | 5.3" | −1.9% | |
| 215/70R15 | 26.9" | 8.5" | 5.9" | +2.9% | compare |
| 235/65R15 | 27.0" | 9.3" | 6.0" | +3.5% | |
| 215/60R15 | 25.2" | 8.5" | 5.1" | −3.6% | |
| 255/60R15 | 27.0" | 10.0" | 6.0" | +3.6% | compare |
| 225/70R15 | 27.4" | 8.9" | 6.2" | +5.0% | compare |
Sizes within 2% of 26.1" on 17" or 16" wheels.
| Size | Diameter | Width | Sidewall | vs 235/60R15 | |
|---|---|---|---|---|---|
| 255/45R17 | 26.0" | 10.0" | 4.5" | −0.3% | |
| 285/40R17 | 26.0" | 11.2" | 4.5" | −0.5% | |
| 295/40R17 | 26.3" | 11.6" | 4.6" | +0.7% | |
| 315/35R17 | 25.7" | 12.4" | 4.3" | −1.6% | |
| 275/40R17 | 25.7" | 10.8" | 4.3" | −1.7% | |
| 245/50R16 | 25.6" | 9.6" | 4.8" | −1.7% |
Actual speed when the speedometer is calibrated for 235/60R15.
| Speedometer shows | on 215/70R15 | on 225/70R15 | on 255/60R15 |
|---|---|---|---|
| 30 mph | 30.9 mph | 31.5 mph | 31.1 mph |
| 45 mph | 46.3 mph | 47.2 mph | 46.6 mph |
| 60 mph | 61.7 mph | 63.0 mph | 62.2 mph |
| 70 mph | 72.0 mph | 73.5 mph | 72.5 mph |
26.1 inches (663 mm). The sidewall is 5.6 inches.
9.3 inches (235 mm) section width, measured sidewall to sidewall.
About 26.1x9.3R15.
215/70R15 is +2.9% in diameter, within the common 3% guideline. It is 0.8" narrower.