235/85R13 tire size in inches
A 235/85R13 tire measures
28.7" tall × 9.3" wide
7.86" sidewall on a 13" wheel. 702 revolutions per mile.
235/85R13 means a tire 235 mm wide, with sidewalls 85% as tall as the tire is wide (200 mm), radial construction (R), for a 13 inch wheel.
235/85R13 specs
| Overall diameter (height) | 28.73 inches (730 mm) |
|---|---|
| Section width | 9.25 inches (235 mm) |
| Sidewall height | 7.86 inches (200 mm) |
| Wheel (rim) diameter | 13 inches |
| Circumference | 90.3 inches (2,292 mm) |
| Revolutions per mile | 702 |
| Revolutions per kilometer | 436 |
| Approximate rim width | 6.0" to 7.5" |
| In inches (flotation style) | 28.7x9.3R13 |
| 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 235/85R13 on a 13" wheel
These 13" sizes are within 3% of 235/85R13's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 245/80R13 | 28.43" | 9.65" | −1.0% | 59.4 mph | Compare |
| 225/85R13 | 28.06" | 8.86" | −2.3% | 58.6 mph | Compare |
| 245/85R13 | 29.40" | 9.65" | +2.3% | 61.4 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 285/30R22 | 22" | 28.73" | 0.0% | Compare |
| 205/85R15 | 15" | 28.72" | 0.0% | Compare |
| 245/40R21 | 21" | 28.72" | 0.0% | Compare |
| 225/55R19 | 19" | 28.74" | +0.1% | Compare |
| 275/45R19 | 19" | 28.74" | +0.1% | Compare |
| 195/70R18 | 18" | 28.75" | +0.1% | Compare |
| 245/35R22 | 22" | 28.75" | +0.1% | Compare |
| 215/75R16 | 16" | 28.70" | −0.1% | Compare |
| 205/60R19 | 19" | 28.69" | −0.2% | Compare |
| 245/45R20 | 20" | 28.68" | −0.2% | Compare |
| 295/55R16 | 16" | 28.78" | +0.2% | Compare |
| 315/35R20 | 20" | 28.68" | −0.2% | Compare |
One size up or down
Compare 235/85R13 with another size
Questions
- How tall is a 235/85R13 tire?
- A 235/85R13 tire is 28.7 inches tall (730 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 235/85R13 mean?
- 235/85R13 means a tire 235 mm wide, with sidewalls 85% as tall as the tire is wide (200 mm), radial construction (R), for a 13 inch wheel.
- How many revolutions per mile does a 235/85R13 tire make?
- About 702 revolutions per mile, based on a circumference of 90.3 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 235/85R13 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 245/80R13 instead of 235/85R13?
- 245/80R13 is −0.30 inches (−1.0%) in overall diameter, so at an indicated 60 mph you would be doing 59.4 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.