275/35R18 tire size in inches
A 275/35R18 tire measures
25.6" tall × 10.8" wide
3.79" sidewall on a 18" wheel. 788 revolutions per mile.
275/35R18 means a tire 275 mm wide, with sidewalls 35% as tall as the tire is wide (96 mm), radial construction (R), for a 18 inch wheel.
275/35R18 specs
| Overall diameter (height) | 25.58 inches (650 mm) |
|---|---|
| Section width | 10.83 inches (275 mm) |
| Sidewall height | 3.79 inches (96 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 80.4 inches (2,041 mm) |
| Revolutions per mile | 788 |
| Revolutions per kilometer | 490 |
| Approximate rim width | 9.0" to 10.5" |
| In inches (flotation style) | 25.6x10.8R18 |
| Aspect ratio | 35% |
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 275/35R18 on a 18" wheel
These 18" sizes are within 3% of 275/35R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 215/45R18 | 25.62" | 8.46" | +0.2% | 60.1 mph | Compare |
| 195/50R18 | 25.68" | 7.68" | +0.4% | 60.2 mph | Compare |
| 245/40R18 | 25.72" | 9.65" | +0.5% | 60.3 mph | Compare |
| 235/40R18 | 25.40" | 9.25" | −0.7% | 59.6 mph | Compare |
| 265/35R18 | 25.30" | 10.43" | −1.1% | 59.4 mph | Compare |
| 285/35R18 | 25.85" | 11.22" | +1.1% | 60.6 mph | Compare |
| 205/45R18 | 25.26" | 8.07" | −1.2% | 59.3 mph | Compare |
| 225/45R18 | 25.97" | 8.86" | +1.5% | 60.9 mph | Compare |
| 255/40R18 | 26.03" | 10.04" | +1.8% | 61.1 mph | Compare |
| 205/50R18 | 26.07" | 8.07" | +1.9% | 61.2 mph | Compare |
| 225/40R18 | 25.09" | 8.86" | −1.9% | 58.8 mph | Compare |
| 255/35R18 | 25.03" | 10.04" | −2.2% | 58.7 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 245/60R14 | 14" | 25.57" | 0.0% | Compare |
| 335/25R19 | 19" | 25.59" | +0.1% | Compare |
| 235/30R20 | 20" | 25.55" | −0.1% | Compare |
| 245/55R15 | 15" | 25.61" | +0.1% | Compare |
| 285/25R20 | 20" | 25.61" | +0.1% | Compare |
| 245/65R13 | 13" | 25.54" | −0.2% | Compare |
| 235/25R21 | 21" | 25.63" | +0.2% | Compare |
| 225/60R15 | 15" | 25.63" | +0.2% | Compare |
| 195/75R14 | 14" | 25.52" | −0.2% | Compare |
| 225/65R14 | 14" | 25.52" | −0.2% | Compare |
| 175/70R16 | 16" | 25.65" | +0.3% | Compare |
| 245/50R16 | 16" | 25.65" | +0.3% | Compare |
One size up or down
- 265/35R18narrower: 25.3" × 10.4"
- 285/35R18wider: 25.9" × 11.2"
- 275/40R18taller sidewall: 26.7" × 10.8"
Compare 275/35R18 with another size
Questions
- How tall is a 275/35R18 tire?
- A 275/35R18 tire is 25.6 inches tall (650 mm), calculated from the size. It is 10.8 inches wide with 3.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 275/35R18 mean?
- 275/35R18 means a tire 275 mm wide, with sidewalls 35% as tall as the tire is wide (96 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 275/35R18 tire make?
- About 788 revolutions per mile, based on a circumference of 80.4 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 275/35R18 tire?
- Roughly 9.0" to 10.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 215/45R18 instead of 275/35R18?
- 215/45R18 is +0.04 inches (+0.2%) 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.