265/55R18 tire size in inches
A 265/55R18 tire measures
29.5" tall × 10.4" wide
5.74" sidewall on a 18" wheel. 684 revolutions per mile.
265/55R18 means a tire 265 mm wide, with sidewalls 55% as tall as the tire is wide (146 mm), radial construction (R), for a 18 inch wheel.
265/55R18 specs
| Overall diameter (height) | 29.48 inches (749 mm) |
|---|---|
| Section width | 10.43 inches (265 mm) |
| Sidewall height | 5.74 inches (146 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 92.6 inches (2,352 mm) |
| Revolutions per mile | 684 |
| Revolutions per kilometer | 425 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 29.5x10.4R18 |
| Aspect ratio | 55% |
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 265/55R18 on a 18" wheel
These 18" sizes are within 3% of 265/55R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 195/75R18 | 29.52" | 7.68" | +0.1% | 60.1 mph | Compare |
| 225/65R18 | 29.52" | 8.86" | +0.1% | 60.1 mph | Compare |
| 325/45R18 | 29.52" | 12.80" | +0.1% | 60.1 mph | Compare |
| 245/60R18 | 29.57" | 9.65" | +0.3% | 60.2 mph | Compare |
| 295/50R18 | 29.61" | 11.61" | +0.5% | 60.3 mph | Compare |
| 205/70R18 | 29.30" | 8.07" | −0.6% | 59.6 mph | Compare |
| 285/50R18 | 29.22" | 11.22" | −0.9% | 59.5 mph | Compare |
| 315/45R18 | 29.16" | 12.40" | −1.1% | 59.4 mph | Compare |
| 215/70R18 | 29.85" | 8.46" | +1.3% | 60.8 mph | Compare |
| 235/60R18 | 29.10" | 9.25" | −1.3% | 59.2 mph | Compare |
| 335/45R18 | 29.87" | 13.19" | +1.3% | 60.8 mph | Compare |
| 255/55R18 | 29.04" | 10.04" | −1.5% | 59.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 245/75R15 | 15" | 29.47" | 0.0% | Compare |
| 285/60R16 | 16" | 29.46" | 0.0% | Compare |
| 205/65R19 | 19" | 29.49" | +0.1% | Compare |
| 295/45R19 | 19" | 29.45" | −0.1% | Compare |
| 245/70R16 | 16" | 29.50" | +0.1% | Compare |
| 345/35R20 | 20" | 29.51" | +0.1% | Compare |
| 315/30R22 | 22" | 29.44" | −0.1% | Compare |
| 245/80R14 | 14" | 29.43" | −0.1% | Compare |
| 265/50R19 | 19" | 29.43" | −0.1% | Compare |
| 265/60R17 | 17" | 29.52" | +0.1% | Compare |
| 245/65R17 | 17" | 29.54" | +0.2% | Compare |
| 275/25R24 | 24" | 29.41" | −0.2% | Compare |
One size up or down
- 255/55R18narrower: 29.0" × 10.0"
- 275/55R18wider: 29.9" × 10.8"
- 265/50R18lower profile: 28.4" × 10.4"
- 265/60R18taller sidewall: 30.5" × 10.4"
Compare 265/55R18 with another size
Questions
- How tall is a 265/55R18 tire?
- A 265/55R18 tire is 29.5 inches tall (749 mm), calculated from the size. It is 10.4 inches wide with 5.7 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 265/55R18 mean?
- 265/55R18 means a tire 265 mm wide, with sidewalls 55% as tall as the tire is wide (146 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 265/55R18 tire make?
- About 684 revolutions per mile, based on a circumference of 92.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 265/55R18 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 195/75R18 instead of 265/55R18?
- 195/75R18 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.