325/60R18 tire size in inches
A 325/60R18 tire measures
33.4" tall × 12.8" wide
7.68" sidewall on a 18" wheel. 605 revolutions per mile.
325/60R18 means a tire 325 mm wide, with sidewalls 60% as tall as the tire is wide (195 mm), radial construction (R), for a 18 inch wheel.
325/60R18 specs
| Overall diameter (height) | 33.35 inches (847 mm) |
|---|---|
| Section width | 12.80 inches (325 mm) |
| Sidewall height | 7.68 inches (195 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 104.8 inches (2,662 mm) |
| Revolutions per mile | 605 |
| Revolutions per kilometer | 376 |
| Approximate rim width | 8.5" to 10.0" |
| In inches (flotation style) | 33.4x12.8R18 |
| Aspect ratio | 60% |
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 325/60R18 on a 18" wheel
These 18" sizes are within 3% of 325/60R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 275/70R18 | 33.16" | 10.83" | −0.6% | 59.6 mph | Compare |
| 305/65R18 | 33.61" | 12.01" | +0.8% | 60.5 mph | Compare |
| 295/65R18 | 33.10" | 11.61" | −0.8% | 59.5 mph | Compare |
| 265/75R18 | 33.65" | 10.43" | +0.9% | 60.5 mph | Compare |
| 255/75R18 | 33.06" | 10.04" | −0.9% | 59.5 mph | Compare |
| 285/70R18 | 33.71" | 11.22" | +1.1% | 60.6 mph | Compare |
| 33x12.50R18 | 33.00" | 12.50" | −1.1% | 59.4 mph | Compare |
| 335/60R18 | 33.83" | 13.19" | +1.4% | 60.8 mph | Compare |
| 315/60R18 | 32.88" | 12.40" | −1.4% | 59.2 mph | Compare |
| 265/70R18 | 32.61" | 10.43" | −2.2% | 58.7 mph | Compare |
| 315/65R18 | 34.12" | 12.40" | +2.3% | 61.4 mph | Compare |
| 285/65R18 | 32.59" | 11.22" | −2.3% | 58.6 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 285/55R21 | 21" | 33.34" | 0.0% | Compare |
| 275/80R16 | 16" | 33.32" | −0.1% | Compare |
| 315/50R21 | 21" | 33.40" | +0.1% | Compare |
| 275/85R15 | 15" | 33.41" | +0.2% | Compare |
| 305/60R19 | 19" | 33.41" | +0.2% | Compare |
| 295/40R24 | 24" | 33.29" | −0.2% | Compare |
| 295/75R16 | 16" | 33.42" | +0.2% | Compare |
| 295/70R17 | 17" | 33.26" | −0.3% | Compare |
| 285/60R20 | 20" | 33.46" | +0.3% | Compare |
| 275/75R17 | 17" | 33.24" | −0.3% | Compare |
| 265/55R22 | 22" | 33.48" | +0.4% | Compare |
| 335/35R24 | 24" | 33.23" | −0.4% | Compare |
One size up or down
- 315/60R18narrower: 32.9" × 12.4"
- 335/60R18wider: 33.8" × 13.2"
- 325/55R18lower profile: 32.1" × 12.8"
- 325/65R18taller sidewall: 34.6" × 12.8"
Compare 325/60R18 with another size
Questions
- How tall is a 325/60R18 tire?
- A 325/60R18 tire is 33.4 inches tall (847 mm), calculated from the size. It is 12.8 inches wide with 7.7 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 325/60R18 mean?
- 325/60R18 means a tire 325 mm wide, with sidewalls 60% as tall as the tire is wide (195 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 325/60R18 tire make?
- About 605 revolutions per mile, based on a circumference of 104.8 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 325/60R18 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 275/70R18 instead of 325/60R18?
- 275/70R18 is −0.20 inches (−0.6%) in overall diameter, so at an indicated 60 mph you would be doing 59.6 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.