265/45R18 tire size in inches
A 265/45R18 tire measures
27.4" tall × 10.4" wide
4.69" sidewall on a 18" wheel. 736 revolutions per mile.
265/45R18 means a tire 265 mm wide, with sidewalls 45% as tall as the tire is wide (119 mm), radial construction (R), for a 18 inch wheel.
265/45R18 specs
| Overall diameter (height) | 27.39 inches (696 mm) |
|---|---|
| Section width | 10.43 inches (265 mm) |
| Sidewall height | 4.69 inches (119 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 86.0 inches (2,186 mm) |
| Revolutions per mile | 736 |
| Revolutions per kilometer | 458 |
| Approximate rim width | 8.5" to 10.0" |
| In inches (flotation style) | 27.4x10.4R18 |
| Aspect ratio | 45% |
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 265/45R18 on a 18" wheel
These 18" sizes are within 3% of 265/45R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 215/55R18 | 27.31" | 8.46" | −0.3% | 59.8 mph | Compare |
| 295/40R18 | 27.29" | 11.61" | −0.4% | 59.8 mph | Compare |
| 235/50R18 | 27.25" | 9.25" | −0.5% | 59.7 mph | Compare |
| 335/35R18 | 27.23" | 13.19" | −0.6% | 59.7 mph | Compare |
| 195/60R18 | 27.21" | 7.68" | −0.6% | 59.6 mph | Compare |
| 305/40R18 | 27.61" | 12.01" | +0.8% | 60.5 mph | Compare |
| 245/50R18 | 27.65" | 9.65" | +0.9% | 60.6 mph | Compare |
| 205/60R18 | 27.69" | 8.07" | +1.1% | 60.6 mph | Compare |
| 225/55R18 | 27.74" | 8.86" | +1.3% | 60.8 mph | Compare |
| 255/45R18 | 27.04" | 10.04" | −1.3% | 59.2 mph | Compare |
| 275/45R18 | 27.74" | 10.83" | +1.3% | 60.8 mph | Compare |
| 285/40R18 | 26.98" | 11.22" | −1.5% | 59.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 215/85R13 | 13" | 27.39" | 0.0% | Compare |
| 355/30R19 | 19" | 27.39" | 0.0% | Compare |
| 185/85R15 | 15" | 27.38" | 0.0% | Compare |
| 325/25R21 | 21" | 27.40" | 0.0% | Compare |
| 225/70R15 | 15" | 27.40" | 0.0% | Compare |
| 235/40R20 | 20" | 27.40" | 0.0% | Compare |
| 305/35R19 | 19" | 27.41" | +0.1% | Compare |
| 275/25R22 | 22" | 27.41" | +0.1% | Compare |
| 265/50R17 | 17" | 27.43" | +0.2% | Compare |
| 265/40R19 | 19" | 27.35" | −0.2% | Compare |
| 285/55R15 | 15" | 27.34" | −0.2% | Compare |
| 315/30R20 | 20" | 27.44" | +0.2% | Compare |
One size up or down
- 255/45R18narrower: 27.0" × 10.0"
- 275/45R18wider: 27.7" × 10.8"
- 265/40R18lower profile: 26.3" × 10.4"
- 265/50R18taller sidewall: 28.4" × 10.4"
Compare 265/45R18 with another size
Questions
- How tall is a 265/45R18 tire?
- A 265/45R18 tire is 27.4 inches tall (696 mm), calculated from the size. It is 10.4 inches wide with 4.7 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 265/45R18 mean?
- 265/45R18 means a tire 265 mm wide, with sidewalls 45% as tall as the tire is wide (119 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 265/45R18 tire make?
- About 736 revolutions per mile, based on a circumference of 86.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 265/45R18 tire?
- Roughly 8.5" to 10.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 215/55R18 instead of 265/45R18?
- 215/55R18 is −0.08 inches (−0.3%) in overall diameter, so at an indicated 60 mph you would be doing 59.8 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.