285/60R18 tire size in inches
A 285/60R18 tire measures
31.5" tall × 11.2" wide
6.73" sidewall on a 18" wheel. 641 revolutions per mile.
285/60R18 means a tire 285 mm wide, with sidewalls 60% as tall as the tire is wide (171 mm), radial construction (R), for a 18 inch wheel.
285/60R18 specs
| Overall diameter (height) | 31.46 inches (799 mm) |
|---|---|
| Section width | 11.22 inches (285 mm) |
| Sidewall height | 6.73 inches (171 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 98.8 inches (2,511 mm) |
| Revolutions per mile | 641 |
| Revolutions per kilometer | 398 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 31.5x11.2R18 |
| Aspect ratio | 60% |
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 285/60R18 on a 18" wheel
These 18" sizes are within 3% of 285/60R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 245/70R18 | 31.50" | 9.65" | +0.1% | 60.1 mph | Compare |
| 265/65R18 | 31.56" | 10.43" | +0.3% | 60.2 mph | Compare |
| 225/75R18 | 31.29" | 8.86" | −0.6% | 59.7 mph | Compare |
| 315/55R18 | 31.64" | 12.40" | +0.6% | 60.3 mph | Compare |
| 305/55R18 | 31.21" | 12.01" | −0.8% | 59.5 mph | Compare |
| 335/50R18 | 31.19" | 13.19" | −0.9% | 59.5 mph | Compare |
| 235/75R18 | 31.88" | 9.25" | +1.3% | 60.8 mph | Compare |
| 255/65R18 | 31.05" | 10.04" | −1.3% | 59.2 mph | Compare |
| 275/60R18 | 30.99" | 10.83" | −1.5% | 59.1 mph | Compare |
| 295/60R18 | 31.94" | 11.61" | +1.5% | 60.9 mph | Compare |
| 235/70R18 | 30.95" | 9.25" | −1.6% | 59.0 mph | Compare |
| 255/70R18 | 32.06" | 10.04" | +1.9% | 61.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 245/75R17 | 17" | 31.47" | 0.0% | Compare |
| 265/55R20 | 20" | 31.48" | 0.0% | Compare |
| 295/45R21 | 21" | 31.45" | 0.0% | Compare |
| 315/30R24 | 24" | 31.44" | −0.1% | Compare |
| 245/80R16 | 16" | 31.43" | −0.1% | Compare |
| 265/50R21 | 21" | 31.43" | −0.1% | Compare |
| 345/35R22 | 22" | 31.51" | +0.1% | Compare |
| 225/65R20 | 20" | 31.52" | +0.2% | Compare |
| 325/45R20 | 20" | 31.52" | +0.2% | Compare |
| 265/60R19 | 19" | 31.52" | +0.2% | Compare |
| 305/60R17 | 17" | 31.41" | −0.2% | Compare |
| 315/50R19 | 19" | 31.40" | −0.2% | Compare |
One size up or down
- 275/60R18narrower: 31.0" × 10.8"
- 295/60R18wider: 31.9" × 11.6"
- 285/55R18lower profile: 30.3" × 11.2"
- 285/65R18taller sidewall: 32.6" × 11.2"
Compare 285/60R18 with another size
Questions
- How tall is a 285/60R18 tire?
- A 285/60R18 tire is 31.5 inches tall (799 mm), calculated from the size. It is 11.2 inches wide with 6.7 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 285/60R18 mean?
- 285/60R18 means a tire 285 mm wide, with sidewalls 60% as tall as the tire is wide (171 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 285/60R18 tire make?
- About 641 revolutions per mile, based on a circumference of 98.8 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 285/60R18 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 245/70R18 instead of 285/60R18?
- 245/70R18 is +0.04 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.