285/75R15 tire size in inches
A 285/75R15 tire measures
31.8" tall × 11.2" wide
8.42" sidewall on a 15" wheel. 634 revolutions per mile.
285/75R15 means a tire 285 mm wide, with sidewalls 75% as tall as the tire is wide (214 mm), radial construction (R), for a 15 inch wheel.
285/75R15 specs
| Overall diameter (height) | 31.83 inches (808 mm) |
|---|---|
| Section width | 11.22 inches (285 mm) |
| Sidewall height | 8.42 inches (214 mm) |
| Wheel (rim) diameter | 15 inches |
| Circumference | 100.0 inches (2,540 mm) |
| Revolutions per mile | 634 |
| Revolutions per kilometer | 394 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 31.8x11.2R15 |
| Aspect ratio | 75% |
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 285/75R15 on a 15" wheel
These 15" sizes are within 3% of 285/75R15's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 265/80R15 | 31.69" | 10.43" | −0.4% | 59.7 mph | Compare |
| 32x11.50R15 | 32.00" | 11.50" | +0.5% | 60.3 mph | Compare |
| 255/85R15 | 32.07" | 10.04" | +0.7% | 60.4 mph | Compare |
| 245/85R15 | 31.40" | 9.65" | −1.4% | 59.2 mph | Compare |
| 275/80R15 | 32.32" | 10.83" | +1.5% | 60.9 mph | Compare |
| 275/75R15 | 31.24" | 10.83" | −1.9% | 58.9 mph | Compare |
| 255/80R15 | 31.06" | 10.04" | −2.4% | 58.6 mph | Compare |
| 31x10.50R15 | 31.00" | 10.50" | −2.6% | 58.4 mph | Compare |
| 265/85R15 | 32.74" | 10.43" | +2.8% | 61.7 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 275/50R21 | 21" | 31.83" | 0.0% | Compare |
| 305/45R21 | 21" | 31.81" | −0.1% | Compare |
| 285/35R24 | 24" | 31.85" | +0.1% | Compare |
| 325/50R19 | 19" | 31.80" | −0.1% | Compare |
| 345/40R21 | 21" | 31.87" | +0.1% | Compare |
| 335/45R20 | 20" | 31.87" | +0.1% | Compare |
| 235/75R18 | 18" | 31.88" | +0.1% | Compare |
| 355/35R22 | 22" | 31.78" | −0.1% | Compare |
| 315/60R17 | 17" | 31.88" | +0.2% | Compare |
| 295/55R19 | 19" | 31.78" | −0.2% | Compare |
| 275/55R20 | 20" | 31.91" | +0.2% | Compare |
| 335/30R24 | 24" | 31.91" | +0.3% | Compare |
One size up or down
- 275/75R15narrower: 31.2" × 10.8"
- 285/70R15lower profile: 30.7" × 11.2"
- 285/80R15taller sidewall: 33.0" × 11.2"
Compare 285/75R15 with another size
Questions
- How tall is a 285/75R15 tire?
- A 285/75R15 tire is 31.8 inches tall (808 mm), calculated from the size. It is 11.2 inches wide with 8.4 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 285/75R15 mean?
- 285/75R15 means a tire 285 mm wide, with sidewalls 75% as tall as the tire is wide (214 mm), radial construction (R), for a 15 inch wheel.
- How many revolutions per mile does a 285/75R15 tire make?
- About 634 revolutions per mile, based on a circumference of 100.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 285/75R15 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 265/80R15 instead of 285/75R15?
- 265/80R15 is −0.14 inches (−0.4%) in overall diameter, so at an indicated 60 mph you would be doing 59.7 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.