345/60R20 tire size
345/60R20 is a metric size: 36.3" tall, 13.6" wide, on a 20" rim — about a 36.5x13.50R20. The sidewall is 8.1" and the tire turns 556 times per mile.
345/60R20 specs
| Overall diameter (height) | 36.30" · 922 mm |
|---|---|
| Section width | 13.58" · 345 mm |
| Sidewall height | 8.15" · 207 mm (60% of width) |
| Rim diameter | 20" |
| Circumference | 114.04" · 2.897 m |
| Revolutions per mile | 556 (345 per km) |
| Inch (flotation) equivalent | 36.5x13.50R20 |
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 | |
|---|---|---|---|---|---|
| 35x12.50R20 common | 35.00" | -3.58% | -27 mm | 57.9 mph | calculate → |
| 37x12.50R20 | 37.00" | +1.93% | -27 mm | 61.2 mph | calculate → |
| 37x13.50R20 | 37.00" | +1.93% | -2 mm | 61.2 mph | calculate → |
| 295/65R20 | 35.10" | -3.31% | -50 mm | 58.0 mph | calculate → |
| 285/65R20 | 34.59" | -4.72% | -60 mm | 57.2 mph | calculate → |
| 325/60R20 | 35.35" | -2.60% | -20 mm | 58.4 mph | calculate → |
| 35x11.50R20 | 35.00" | -3.58% | -53 mm | 57.9 mph | calculate → |
| 35x13.50R20 | 35.00" | -3.58% | -2 mm | 57.9 mph | calculate → |
| 38x13.50R20 | 38.00" | +4.69% | -2 mm | 62.8 mph | calculate → |
| 38x15.50R20 | 38.00" | +4.69% | +49 mm | 62.8 mph | calculate → |
| 315/60R20 | 34.88" | -3.90% | -30 mm | 57.7 mph | calculate → |
| 37x11.50R20 | 37.00" | +1.93% | -53 mm | 61.2 mph | calculate → |
| 35x15.50R20 | 35.00" | -3.58% | +49 mm | 57.9 mph | calculate → |
| 36x13.50R20 | 36.00" | -0.82% | -2 mm | 59.5 mph | calculate → |
| 38x14.50R20 | 38.00" | +4.69% | +23 mm | 62.8 mph | calculate → |
| 375/55R20 | 36.24" | -0.16% | +30 mm | 59.9 mph | calculate → |
| 36x15.50R20 | 36.00" | -0.82% | +49 mm | 59.5 mph | calculate → |
| 285/70R20 | 35.71" | -1.63% | -60 mm | 59.0 mph | calculate → |
| 37x14.50R20 | 37.00" | +1.93% | +23 mm | 61.2 mph | calculate → |
| 35x13.00R20 | 35.00" | -3.58% | -15 mm | 57.9 mph | calculate → |
| 35x14.50R20 | 35.00" | -3.58% | +23 mm | 57.9 mph | calculate → |
| 38x11.50R20 | 38.00" | +4.69% | -53 mm | 62.8 mph | calculate → |
| 355/60R20 | 36.77" | +1.30% | +10 mm | 60.8 mph | calculate → |
Try another size against 345/60R20
Questions
What size is 345/60R20 in inches?
345/60R20 is about 36.3" tall and 13.6" wide on a 20-inch rim — roughly a 36.5x13.50R20 in inch sizing.
What does 345/60R20 mean?
345 mm section width, sidewall 60% of the width (8.15"), radial construction, 20-inch rim.
What tire sizes are equivalent to 345/60R20?
On the same 20" rim, within 3% of the diameter: 375/55R20 (-0.16%), 36x13.50R20 (-0.82%), 36x15.50R20 (-0.82%), 355/60R20 (+1.30%), 285/70R20 (-1.63%), 37x11.50R20 (+1.93%).
How many revolutions per mile does a 345/60R20 tire make?
About 556 revolutions per mile (circumference 114.0").
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.