235/85R15 tire size in inches
A 235/85R15 tire measures
30.7" tall × 9.3" wide
7.86" sidewall on a 15" wheel. 656 revolutions per mile.
235/85R15 means a tire 235 mm wide, with sidewalls 85% as tall as the tire is wide (200 mm), radial construction (R), for a 15 inch wheel.
235/85R15 specs
| Overall diameter (height) | 30.73 inches (781 mm) |
|---|---|
| Section width | 9.25 inches (235 mm) |
| Sidewall height | 7.86 inches (200 mm) |
| Wheel (rim) diameter | 15 inches |
| Circumference | 96.5 inches (2,452 mm) |
| Revolutions per mile | 656 |
| Revolutions per kilometer | 408 |
| Approximate rim width | 6.0" to 7.5" |
| In inches (flotation style) | 30.7x9.3R15 |
| Aspect ratio | 85% |
Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.
Sizes that can replace 235/85R15 on a 15" wheel
These 15" sizes are within 3% of 235/85R15's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 285/70R15 | 30.71" | 11.22" | −0.1% | 60.0 mph | Compare |
| 265/75R15 | 30.65" | 10.43" | −0.3% | 59.8 mph | Compare |
| 31x10.50R15 | 31.00" | 10.50" | +0.9% | 60.5 mph | Compare |
| 245/80R15 | 30.43" | 9.65" | −1.0% | 59.4 mph | Compare |
| 255/80R15 | 31.06" | 10.04" | +1.1% | 60.7 mph | Compare |
| 275/75R15 | 31.24" | 10.83" | +1.7% | 61.0 mph | Compare |
| 275/70R15 | 30.16" | 10.83" | −1.9% | 58.9 mph | Compare |
| 225/85R15 | 30.06" | 8.86" | −2.2% | 58.7 mph | Compare |
| 245/85R15 | 31.40" | 9.65" | +2.2% | 61.3 mph | Compare |
| 255/75R15 | 30.06" | 10.04" | −2.2% | 58.7 mph | Compare |
| 30x9.50R15 | 30.00" | 9.50" | −2.4% | 58.6 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 285/30R24 | 24" | 30.73" | 0.0% | Compare |
| 225/55R21 | 21" | 30.74" | +0.1% | Compare |
| 275/45R21 | 21" | 30.74" | +0.1% | Compare |
| 215/75R18 | 18" | 30.70" | −0.1% | Compare |
| 265/80R14 | 14" | 30.69" | −0.1% | Compare |
| 245/45R22 | 22" | 30.68" | −0.2% | Compare |
| 295/55R18 | 18" | 30.78" | +0.2% | Compare |
| 315/35R22 | 22" | 30.68" | −0.2% | Compare |
| 355/35R21 | 21" | 30.78" | +0.2% | Compare |
| 345/25R24 | 24" | 30.79" | +0.2% | Compare |
| 325/50R18 | 18" | 30.80" | +0.2% | Compare |
| 275/40R22 | 22" | 30.66" | −0.2% | Compare |
One size up or down
Compare 235/85R15 with another size
Questions
- How tall is a 235/85R15 tire?
- A 235/85R15 tire is 30.7 inches tall (781 mm), calculated from the size. It is 9.3 inches wide with 7.9 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 235/85R15 mean?
- 235/85R15 means a tire 235 mm wide, with sidewalls 85% as tall as the tire is wide (200 mm), radial construction (R), for a 15 inch wheel.
- How many revolutions per mile does a 235/85R15 tire make?
- About 656 revolutions per mile, based on a circumference of 96.5 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 235/85R15 tire?
- Roughly 6.0" to 7.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 285/70R15 instead of 235/85R15?
- 285/70R15 is −0.02 inches (−0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.