265/65R18 tire size in inches
A 265/65R18 tire measures
31.6" tall × 10.4" wide
6.78" sidewall on a 18" wheel. 639 revolutions per mile.
265/65R18 means a tire 265 mm wide, with sidewalls 65% as tall as the tire is wide (172 mm), radial construction (R), for a 18 inch wheel.
265/65R18 specs
| Overall diameter (height) | 31.56 inches (802 mm) |
|---|---|
| Section width | 10.43 inches (265 mm) |
| Sidewall height | 6.78 inches (172 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 99.2 inches (2,519 mm) |
| Revolutions per mile | 639 |
| Revolutions per kilometer | 397 |
| Approximate rim width | 7.0" to 8.5" |
| In inches (flotation style) | 31.6x10.4R18 |
| Aspect ratio | 65% |
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 265/65R18 on a 18" wheel
These 18" sizes are within 3% of 265/65R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 245/70R18 | 31.50" | 9.65" | −0.2% | 59.9 mph | Compare |
| 315/55R18 | 31.64" | 12.40" | +0.2% | 60.1 mph | Compare |
| 285/60R18 | 31.46" | 11.22" | −0.3% | 59.8 mph | Compare |
| 225/75R18 | 31.29" | 8.86" | −0.9% | 59.5 mph | Compare |
| 235/75R18 | 31.88" | 9.25" | +1.0% | 60.6 mph | Compare |
| 305/55R18 | 31.21" | 12.01" | −1.1% | 59.3 mph | Compare |
| 295/60R18 | 31.94" | 11.61" | +1.2% | 60.7 mph | Compare |
| 335/50R18 | 31.19" | 13.19" | −1.2% | 59.3 mph | Compare |
| 255/70R18 | 32.06" | 10.04" | +1.6% | 60.9 mph | Compare |
| 255/65R18 | 31.05" | 10.04" | −1.6% | 59.0 mph | Compare |
| 275/65R18 | 32.07" | 10.83" | +1.6% | 61.0 mph | Compare |
| 325/55R18 | 32.07" | 12.80" | +1.6% | 61.0 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 335/40R21 | 21" | 31.55" | 0.0% | Compare |
| 245/60R20 | 20" | 31.57" | 0.0% | Compare |
| 275/35R24 | 24" | 31.58" | 0.0% | Compare |
| 355/45R19 | 19" | 31.58" | 0.0% | Compare |
| 245/65R19 | 19" | 31.54" | −0.1% | Compare |
| 285/65R17 | 17" | 31.59" | +0.1% | Compare |
| 265/60R19 | 19" | 31.52" | −0.1% | Compare |
| 265/70R17 | 17" | 31.61" | +0.1% | Compare |
| 305/40R22 | 22" | 31.61" | +0.1% | Compare |
| 225/65R20 | 20" | 31.52" | −0.1% | Compare |
| 245/55R21 | 21" | 31.61" | +0.1% | Compare |
| 325/45R20 | 20" | 31.52" | −0.1% | Compare |
One size up or down
- 255/65R18narrower: 31.1" × 10.0"
- 275/65R18wider: 32.1" × 10.8"
- 265/60R18lower profile: 30.5" × 10.4"
- 265/70R18taller sidewall: 32.6" × 10.4"
Compare 265/65R18 with another size
Questions
- How tall is a 265/65R18 tire?
- A 265/65R18 tire is 31.6 inches tall (802 mm), calculated from the size. It is 10.4 inches wide with 6.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 265/65R18 mean?
- 265/65R18 means a tire 265 mm wide, with sidewalls 65% as tall as the tire is wide (172 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 265/65R18 tire make?
- About 639 revolutions per mile, based on a circumference of 99.2 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 265/65R18 tire?
- Roughly 7.0" to 8.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 245/70R18 instead of 265/65R18?
- 245/70R18 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.