355/55R20 tire size in inches
A 355/55R20 tire measures
35.4" tall × 14.0" wide
7.69" sidewall on a 20" wheel. 570 revolutions per mile.
355/55R20 means a tire 355 mm wide, with sidewalls 55% as tall as the tire is wide (195 mm), radial construction (R), for a 20 inch wheel.
355/55R20 specs
| Overall diameter (height) | 35.37 inches (899 mm) |
|---|---|
| Section width | 13.98 inches (355 mm) |
| Sidewall height | 7.69 inches (195 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 111.1 inches (2,823 mm) |
| Revolutions per mile | 570 |
| Revolutions per kilometer | 354 |
| Approximate rim width | 10.0" to 11.5" |
| In inches (flotation style) | 35.4x14.0R20 |
| 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 355/55R20 on a 20" wheel
These 20" sizes are within 3% of 355/55R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 325/60R20 | 35.35" | 12.80" | −0.1% | 60.0 mph | Compare |
| 305/65R20 | 35.61" | 12.01" | +0.7% | 60.4 mph | Compare |
| 295/65R20 | 35.10" | 11.61" | −0.8% | 59.5 mph | Compare |
| 35x12.50R20 | 35.00" | 12.50" | −1.1% | 59.4 mph | Compare |
| 345/55R20 | 34.94" | 13.58" | −1.2% | 59.3 mph | Compare |
| 335/60R20 | 35.83" | 13.19" | +1.3% | 60.8 mph | Compare |
| 315/60R20 | 34.88" | 12.40" | −1.4% | 59.2 mph | Compare |
| 285/65R20 | 34.59" | 11.22" | −2.2% | 58.7 mph | Compare |
| 335/55R20 | 34.51" | 13.19" | −2.4% | 58.5 mph | Compare |
| 305/60R20 | 34.41" | 12.01" | −2.7% | 58.4 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 315/70R18 | 18" | 35.36" | 0.0% | Compare |
| 295/75R18 | 18" | 35.42" | +0.1% | Compare |
| 345/60R19 | 19" | 35.30" | −0.2% | Compare |
| 335/55R21 | 21" | 35.51" | +0.4% | Compare |
| 305/55R22 | 22" | 35.21" | −0.5% | Compare |
| 335/50R22 | 22" | 35.19" | −0.5% | Compare |
| 355/40R24 | 24" | 35.18" | −0.5% | Compare |
| 345/50R22 | 22" | 35.58" | +0.6% | Compare |
| 335/65R18 | 18" | 35.15" | −0.6% | Compare |
| 315/75R17 | 17" | 35.60" | +0.6% | Compare |
| 315/65R19 | 19" | 35.12" | −0.7% | Compare |
| 325/65R19 | 19" | 35.63" | +0.7% | Compare |
One size up or down
Compare 355/55R20 with another size
Questions
- How tall is a 355/55R20 tire?
- A 355/55R20 tire is 35.4 inches tall (899 mm), calculated from the size. It is 14.0 inches wide with 7.7 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 355/55R20 mean?
- 355/55R20 means a tire 355 mm wide, with sidewalls 55% as tall as the tire is wide (195 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 355/55R20 tire make?
- About 570 revolutions per mile, based on a circumference of 111.1 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 355/55R20 tire?
- Roughly 10.0" to 11.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 325/60R20 instead of 355/55R20?
- 325/60R20 is −0.02 inches (−0.1%) 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.