355/45R20 tire size in inches
A 355/45R20 tire measures
32.6" tall × 14.0" wide
6.29" sidewall on a 20" wheel. 619 revolutions per mile.
355/45R20 means a tire 355 mm wide, with sidewalls 45% as tall as the tire is wide (160 mm), radial construction (R), for a 20 inch wheel.
355/45R20 specs
| Overall diameter (height) | 32.58 inches (827 mm) |
|---|---|
| Section width | 13.98 inches (355 mm) |
| Sidewall height | 6.29 inches (160 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 102.3 inches (2,600 mm) |
| Revolutions per mile | 619 |
| Revolutions per kilometer | 385 |
| Approximate rim width | 11.5" to 13.0" |
| In inches (flotation style) | 32.6x14.0R20 |
| 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 355/45R20 on a 20" wheel
These 20" sizes are within 3% of 355/45R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 245/65R20 | 32.54" | 9.65" | −0.1% | 59.9 mph | Compare |
| 265/60R20 | 32.52" | 10.43" | −0.2% | 59.9 mph | Compare |
| 315/50R20 | 32.40" | 12.40" | −0.5% | 59.7 mph | Compare |
| 295/55R20 | 32.78" | 11.61" | +0.6% | 60.4 mph | Compare |
| 325/50R20 | 32.80" | 12.80" | +0.7% | 60.4 mph | Compare |
| 285/55R20 | 32.34" | 11.22" | −0.7% | 59.6 mph | Compare |
| 345/45R20 | 32.22" | 13.58" | −1.1% | 59.3 mph | Compare |
| 275/60R20 | 32.99" | 10.83" | +1.3% | 60.8 mph | Compare |
| 33x12.50R20 | 33.00" | 12.50" | +1.3% | 60.8 mph | Compare |
| 255/65R20 | 33.05" | 10.04" | +1.5% | 60.9 mph | Compare |
| 255/60R20 | 32.05" | 10.04" | −1.6% | 59.0 mph | Compare |
| 235/65R20 | 32.03" | 9.25" | −1.7% | 59.0 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 345/50R19 | 19" | 32.58" | 0.0% | Compare |
| 285/65R18 | 18" | 32.59" | 0.0% | Compare |
| 265/65R19 | 19" | 32.56" | 0.0% | Compare |
| 335/40R22 | 22" | 32.55" | −0.1% | Compare |
| 265/70R18 | 18" | 32.61" | +0.1% | Compare |
| 245/55R22 | 22" | 32.61" | +0.1% | Compare |
| 305/65R17 | 17" | 32.61" | +0.1% | Compare |
| 295/50R21 | 21" | 32.61" | +0.1% | Compare |
| 325/45R21 | 21" | 32.52" | −0.2% | Compare |
| 315/55R19 | 19" | 32.64" | +0.2% | Compare |
| 335/55R18 | 18" | 32.51" | −0.2% | Compare |
| 265/75R17 | 17" | 32.65" | +0.2% | Compare |
One size up or down
- 345/45R20narrower: 32.2" × 13.6"
- 355/40R20lower profile: 31.2" × 14.0"
- 355/50R20taller sidewall: 34.0" × 14.0"
Compare 355/45R20 with another size
Questions
- How tall is a 355/45R20 tire?
- A 355/45R20 tire is 32.6 inches tall (827 mm), calculated from the size. It is 14.0 inches wide with 6.3 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 355/45R20 mean?
- 355/45R20 means a tire 355 mm wide, with sidewalls 45% as tall as the tire is wide (160 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 355/45R20 tire make?
- About 619 revolutions per mile, based on a circumference of 102.3 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 355/45R20 tire?
- Roughly 11.5" to 13.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 245/65R20 instead of 355/45R20?
- 245/65R20 is −0.04 inches (−0.1%) 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.