285/85R15 tire size in inches
A 285/85R15 tire measures
34.1" tall × 11.2" wide
9.54" sidewall on a 15" wheel. 592 revolutions per mile.
285/85R15 means a tire 285 mm wide, with sidewalls 85% as tall as the tire is wide (242 mm), radial construction (R), for a 15 inch wheel.
285/85R15 specs
| Overall diameter (height) | 34.07 inches (865 mm) |
|---|---|
| Section width | 11.22 inches (285 mm) |
| Sidewall height | 9.54 inches (242 mm) |
| Wheel (rim) diameter | 15 inches |
| Circumference | 107.0 inches (2,719 mm) |
| Revolutions per mile | 592 |
| Revolutions per kilometer | 368 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 34.1x11.2R15 |
| 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 285/85R15 on a 15" wheel
These 15" sizes are within 3% of 285/85R15's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 275/85R15 | 33.41" | 10.83" | −2.0% | 58.8 mph | Compare |
| 35x12.50R15 | 35.00" | 12.50" | +2.7% | 61.6 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 275/65R20 | 20" | 34.07" | 0.0% | Compare |
| 325/55R20 | 20" | 34.07" | 0.0% | Compare |
| 295/65R19 | 19" | 34.10" | +0.1% | Compare |
| 315/65R18 | 18" | 34.12" | +0.1% | Compare |
| 305/50R22 | 22" | 34.01" | −0.2% | Compare |
| 355/50R20 | 20" | 33.98" | −0.3% | Compare |
| 335/50R21 | 21" | 34.19" | +0.3% | Compare |
| 285/80R16 | 16" | 33.95" | −0.4% | Compare |
| 345/55R19 | 19" | 33.94" | −0.4% | Compare |
| 305/55R21 | 21" | 34.21" | +0.4% | Compare |
| 295/60R20 | 20" | 33.94" | −0.4% | Compare |
| 345/45R22 | 22" | 34.22" | +0.4% | Compare |
One size up or down
Compare 285/85R15 with another size
Questions
- How tall is a 285/85R15 tire?
- A 285/85R15 tire is 34.1 inches tall (865 mm), calculated from the size. It is 11.2 inches wide with 9.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 285/85R15 mean?
- 285/85R15 means a tire 285 mm wide, with sidewalls 85% as tall as the tire is wide (242 mm), radial construction (R), for a 15 inch wheel.
- How many revolutions per mile does a 285/85R15 tire make?
- About 592 revolutions per mile, based on a circumference of 107.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 285/85R15 tire?
- Roughly 7.5" to 9.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 275/85R15 instead of 285/85R15?
- 275/85R15 is −0.67 inches (−2.0%) in overall diameter, so at an indicated 60 mph you would be doing 58.8 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.