355/50R20 tire size
355/50R20 is a metric size: 34.0" tall, 14.0" wide, on a 20" rim — about a 34x14.00R20. The sidewall is 7.0" and the tire turns 594 times per mile.
355/50R20 specs
| Overall diameter (height) | 33.98" · 863 mm |
|---|---|
| Section width | 13.98" · 355 mm |
| Sidewall height | 6.99" · 178 mm (50% of width) |
| Rim diameter | 20" |
| Circumference | 106.74" · 2.711 m |
| Revolutions per mile | 594 (369 per km) |
| Inch (flotation) equivalent | 34x14.00R20 |
Equivalent sizes on a 20" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 275/60R20 common | 32.99" | -2.90% | -80 mm | 58.3 mph | calculate → |
| 275/65R20 common | 34.07" | +0.29% | -80 mm | 60.2 mph | calculate → |
| 35x12.50R20 common | 35.00" | +3.01% | -37 mm | 61.8 mph | calculate → |
| 265/60R20 common | 32.52" | -4.29% | -90 mm | 57.4 mph | calculate → |
| 305/55R20 common | 33.21" | -2.26% | -50 mm | 58.6 mph | calculate → |
| 285/55R20 common | 32.34" | -4.81% | -70 mm | 57.1 mph | calculate → |
| 285/60R20 common | 33.46" | -1.51% | -70 mm | 59.1 mph | calculate → |
| 33x12.50R20 common | 33.00" | -2.87% | -37 mm | 58.3 mph | calculate → |
| 295/60R20 | 33.94" | -0.12% | -60 mm | 59.9 mph | calculate → |
| 295/55R20 | 32.78" | -3.53% | -60 mm | 57.9 mph | calculate → |
| 295/65R20 | 35.10" | +3.30% | -60 mm | 62.0 mph | calculate → |
| 285/65R20 | 34.59" | +1.80% | -70 mm | 61.1 mph | calculate → |
| 325/60R20 | 35.35" | +4.06% | -30 mm | 62.4 mph | calculate → |
| 35x11.50R20 | 35.00" | +3.01% | -63 mm | 61.8 mph | calculate → |
| 35x13.50R20 | 35.00" | +3.01% | -12 mm | 61.8 mph | calculate → |
| 315/60R20 | 34.88" | +2.67% | -40 mm | 61.6 mph | calculate → |
| 33x13.50R20 | 33.00" | -2.87% | -12 mm | 58.3 mph | calculate → |
| 35x15.50R20 | 35.00" | +3.01% | +39 mm | 61.8 mph | calculate → |
| 33x11.50R20 | 33.00" | -2.87% | -63 mm | 58.3 mph | calculate → |
| 34x11.50R20 | 34.00" | +0.07% | -63 mm | 60.0 mph | calculate → |
| 305/60R20 | 34.41" | +1.27% | -50 mm | 60.8 mph | calculate → |
| 375/45R20 | 33.29" | -2.03% | +20 mm | 58.8 mph | calculate → |
| 33x12.00R20 | 33.00" | -2.87% | -50 mm | 58.3 mph | calculate → |
| 33x22.00R20 | 33.00" | -2.87% | +204 mm | 58.3 mph | calculate → |
| 35x13.00R20 | 35.00" | +3.01% | -25 mm | 61.8 mph | calculate → |
| 35x14.50R20 | 35.00" | +3.01% | +13 mm | 61.8 mph | calculate → |
| 325/50R20 | 32.80" | -3.48% | -30 mm | 57.9 mph | calculate → |
| 33x14.50R20 | 33.00" | -2.87% | +13 mm | 58.3 mph | calculate → |
| 315/50R20 | 32.40" | -4.63% | -40 mm | 57.2 mph | calculate → |
Try another size against 355/50R20
Questions
What size is 355/50R20 in inches?
355/50R20 is about 34.0" tall and 14.0" wide on a 20-inch rim — roughly a 34x14.00R20 in inch sizing.
What does 355/50R20 mean?
355 mm section width, sidewall 50% of the width (6.99"), radial construction, 20-inch rim.
What tire sizes are equivalent to 355/50R20?
On the same 20" rim, within 3% of the diameter: 34x11.50R20 (+0.07%), 295/60R20 (-0.12%), 275/65R20 (+0.29%), 305/60R20 (+1.27%), 285/60R20 (-1.51%), 285/65R20 (+1.80%).
How many revolutions per mile does a 355/50R20 tire make?
About 594 revolutions per mile (circumference 106.7").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.