275/70R18 tire size in inches
A 275/70R18 tire measures
33.2" tall × 10.8" wide
7.58" sidewall on a 18" wheel. 608 revolutions per mile.
275/70R18 means a tire 275 mm wide, with sidewalls 70% as tall as the tire is wide (193 mm), radial construction (R), for a 18 inch wheel.
275/70R18 specs
| Overall diameter (height) | 33.16 inches (842 mm) |
|---|---|
| Section width | 10.83 inches (275 mm) |
| Sidewall height | 7.58 inches (193 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 104.2 inches (2,646 mm) |
| Revolutions per mile | 608 |
| Revolutions per kilometer | 378 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 33.2x10.8R18 |
| Aspect ratio | 70% |
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 275/70R18 on a 18" wheel
These 18" sizes are within 3% of 275/70R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 295/65R18 | 33.10" | 11.61" | −0.2% | 59.9 mph | Compare |
| 255/75R18 | 33.06" | 10.04" | −0.3% | 59.8 mph | Compare |
| 33x12.50R18 | 33.00" | 12.50" | −0.5% | 59.7 mph | Compare |
| 325/60R18 | 33.35" | 12.80" | +0.6% | 60.4 mph | Compare |
| 315/60R18 | 32.88" | 12.40" | −0.8% | 59.5 mph | Compare |
| 305/65R18 | 33.61" | 12.01" | +1.4% | 60.8 mph | Compare |
| 265/75R18 | 33.65" | 10.43" | +1.5% | 60.9 mph | Compare |
| 265/70R18 | 32.61" | 10.43" | −1.7% | 59.0 mph | Compare |
| 285/70R18 | 33.71" | 11.22" | +1.7% | 61.0 mph | Compare |
| 285/65R18 | 32.59" | 11.22" | −1.7% | 59.0 mph | Compare |
| 335/55R18 | 32.51" | 13.19" | −2.0% | 58.8 mph | Compare |
| 335/60R18 | 33.83" | 13.19" | +2.0% | 61.2 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 315/45R22 | 22" | 33.16" | 0.0% | Compare |
| 355/40R22 | 22" | 33.18" | +0.1% | Compare |
| 335/50R20 | 20" | 33.19" | +0.1% | Compare |
| 315/65R17 | 17" | 33.12" | −0.1% | Compare |
| 305/55R20 | 20" | 33.21" | +0.2% | Compare |
| 285/50R22 | 22" | 33.22" | +0.2% | Compare |
| 345/45R21 | 21" | 33.22" | +0.2% | Compare |
| 335/35R24 | 24" | 33.23" | +0.2% | Compare |
| 275/75R17 | 17" | 33.24" | +0.2% | Compare |
| 275/65R19 | 19" | 33.07" | −0.2% | Compare |
| 325/55R19 | 19" | 33.07" | −0.2% | Compare |
| 255/85R16 | 16" | 33.07" | −0.3% | Compare |
One size up or down
- 265/70R18narrower: 32.6" × 10.4"
- 285/70R18wider: 33.7" × 11.2"
- 275/65R18lower profile: 32.1" × 10.8"
- 275/75R18taller sidewall: 34.2" × 10.8"
Compare 275/70R18 with another size
Questions
- How tall is a 275/70R18 tire?
- A 275/70R18 tire is 33.2 inches tall (842 mm), calculated from the size. It is 10.8 inches wide with 7.6 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 275/70R18 mean?
- 275/70R18 means a tire 275 mm wide, with sidewalls 70% as tall as the tire is wide (193 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 275/70R18 tire make?
- About 608 revolutions per mile, based on a circumference of 104.2 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 275/70R18 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 295/65R18 instead of 275/70R18?
- 295/65R18 is −0.06 inches (−0.2%) 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.