275/60R18 tire size in inches
A 275/60R18 tire measures
31.0" tall × 10.8" wide
6.50" sidewall on a 18" wheel. 651 revolutions per mile.
275/60R18 means a tire 275 mm wide, with sidewalls 60% as tall as the tire is wide (165 mm), radial construction (R), for a 18 inch wheel.
275/60R18 specs
| Overall diameter (height) | 30.99 inches (787 mm) |
|---|---|
| Section width | 10.83 inches (275 mm) |
| Sidewall height | 6.50 inches (165 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 97.4 inches (2,473 mm) |
| Revolutions per mile | 651 |
| Revolutions per kilometer | 404 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 31.0x10.8R18 |
| 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 275/60R18 on a 18" wheel
These 18" sizes are within 3% of 275/60R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 235/70R18 | 30.95" | 9.25" | −0.1% | 59.9 mph | Compare |
| 255/65R18 | 31.05" | 10.04" | +0.2% | 60.1 mph | Compare |
| 335/50R18 | 31.19" | 13.19" | +0.6% | 60.4 mph | Compare |
| 325/50R18 | 30.80" | 12.80" | −0.6% | 59.6 mph | Compare |
| 295/55R18 | 30.78" | 11.61" | −0.7% | 59.6 mph | Compare |
| 305/55R18 | 31.21" | 12.01" | +0.7% | 60.4 mph | Compare |
| 225/75R18 | 31.29" | 8.86" | +1.0% | 60.6 mph | Compare |
| 215/75R18 | 30.70" | 8.46" | −1.0% | 59.4 mph | Compare |
| 245/65R18 | 30.54" | 9.65" | −1.5% | 59.1 mph | Compare |
| 265/60R18 | 30.52" | 10.43" | −1.5% | 59.1 mph | Compare |
| 285/60R18 | 31.46" | 11.22" | +1.5% | 60.9 mph | Compare |
| 245/70R18 | 31.50" | 9.65" | +1.7% | 61.0 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 355/25R24 | 24" | 30.99" | 0.0% | Compare |
| 31x10.50R15 | 15" | 31.00" | 0.0% | Compare |
| 215/65R20 | 20" | 31.00" | 0.0% | Compare |
| 305/50R19 | 19" | 31.01" | +0.1% | Compare |
| 285/40R22 | 22" | 30.98" | −0.1% | Compare |
| 295/30R24 | 24" | 30.97" | −0.1% | Compare |
| 235/65R19 | 19" | 31.03" | +0.1% | Compare |
| 255/35R24 | 24" | 31.03" | +0.1% | Compare |
| 325/35R22 | 22" | 30.96" | −0.1% | Compare |
| 255/45R22 | 22" | 31.04" | +0.1% | Compare |
| 255/50R21 | 21" | 31.04" | +0.2% | Compare |
| 255/55R20 | 20" | 31.04" | +0.2% | Compare |
One size up or down
- 265/60R18narrower: 30.5" × 10.4"
- 285/60R18wider: 31.5" × 11.2"
- 275/55R18lower profile: 29.9" × 10.8"
- 275/65R18taller sidewall: 32.1" × 10.8"
Compare 275/60R18 with another size
Questions
- How tall is a 275/60R18 tire?
- A 275/60R18 tire is 31.0 inches tall (787 mm), calculated from the size. It is 10.8 inches wide with 6.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 275/60R18 mean?
- 275/60R18 means a tire 275 mm wide, with sidewalls 60% as tall as the tire is wide (165 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 275/60R18 tire make?
- About 651 revolutions per mile, based on a circumference of 97.4 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 275/60R18 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 235/70R18 instead of 275/60R18?
- 235/70R18 is −0.04 inches (−0.1%) in overall diameter, so at an indicated 60 mph you would be doing 59.9 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.