325/55R20 tire size in inches
A 325/55R20 tire measures
34.1" tall × 12.8" wide
7.04" sidewall on a 20" wheel. 592 revolutions per mile.
325/55R20 means a tire 325 mm wide, with sidewalls 55% as tall as the tire is wide (179 mm), radial construction (R), for a 20 inch wheel.
325/55R20 specs
| Overall diameter (height) | 34.07 inches (865 mm) |
|---|---|
| Section width | 12.80 inches (325 mm) |
| Sidewall height | 7.04 inches (179 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 107.0 inches (2,719 mm) |
| Revolutions per mile | 592 |
| Revolutions per kilometer | 368 |
| Approximate rim width | 9.5" to 11.0" |
| In inches (flotation style) | 34.1x12.8R20 |
| 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 325/55R20 on a 20" wheel
These 20" sizes are within 3% of 325/55R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 275/65R20 | 34.07" | 10.83" | 0.0% | 60.0 mph | Compare |
| 355/50R20 | 33.98" | 13.98" | −0.3% | 59.8 mph | Compare |
| 295/60R20 | 33.94" | 11.61" | −0.4% | 59.8 mph | Compare |
| 305/60R20 | 34.41" | 12.01" | +1.0% | 60.6 mph | Compare |
| 315/55R20 | 33.64" | 12.40" | −1.3% | 59.2 mph | Compare |
| 335/55R20 | 34.51" | 13.19" | +1.3% | 60.8 mph | Compare |
| 345/50R20 | 33.58" | 13.58" | −1.4% | 59.1 mph | Compare |
| 265/65R20 | 33.56" | 10.43" | −1.5% | 59.1 mph | Compare |
| 285/65R20 | 34.59" | 11.22" | +1.5% | 60.9 mph | Compare |
| 285/60R20 | 33.46" | 11.22" | −1.8% | 58.9 mph | Compare |
| 315/60R20 | 34.88" | 12.40" | +2.4% | 61.4 mph | Compare |
| 305/55R20 | 33.21" | 12.01" | −2.5% | 58.5 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 285/85R15 | 15" | 34.07" | 0.0% | Compare |
| 295/65R19 | 19" | 34.10" | +0.1% | Compare |
| 315/65R18 | 18" | 34.12" | +0.1% | Compare |
| 305/50R22 | 22" | 34.01" | −0.2% | Compare |
| 335/50R21 | 21" | 34.19" | +0.3% | Compare |
| 285/80R16 | 16" | 33.95" | −0.4% | Compare |
| 345/55R19 | 19" | 33.94" | −0.4% | Compare |
| 305/55R21 | 21" | 34.21" | +0.4% | Compare |
| 345/45R22 | 22" | 34.22" | +0.4% | Compare |
| 315/40R24 | 24" | 33.92" | −0.5% | Compare |
| 325/40R24 | 24" | 34.24" | +0.5% | Compare |
| 275/55R22 | 22" | 33.91" | −0.5% | Compare |
One size up or down
- 315/55R20narrower: 33.6" × 12.4"
- 335/55R20wider: 34.5" × 13.2"
- 325/50R20lower profile: 32.8" × 12.8"
- 325/60R20taller sidewall: 35.4" × 12.8"
Compare 325/55R20 with another size
Questions
- How tall is a 325/55R20 tire?
- A 325/55R20 tire is 34.1 inches tall (865 mm), calculated from the size. It is 12.8 inches wide with 7.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 325/55R20 mean?
- 325/55R20 means a tire 325 mm wide, with sidewalls 55% as tall as the tire is wide (179 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 325/55R20 tire make?
- About 592 revolutions per mile, based on a circumference of 107.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 325/55R20 tire?
- Roughly 9.5" to 11.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 275/65R20 instead of 325/55R20?
- 275/65R20 is 0.00 inches (0.0%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.