36x15.50R20 tire size
36x15.50R20 is a flotation (inch) size: 36.0" tall, 15.5" wide, on a 20" rim — about a 390/50R20. The sidewall is 8.0" and the tire turns 560 times per mile.
36x15.50R20 specs
| Overall diameter (height) | 36.00" · 914 mm |
|---|---|
| Section width | 15.50" · 394 mm |
| Sidewall height | 8.00" · 203 mm (52% of width) |
| Rim diameter | 20" |
| Circumference | 113.10" · 2.873 m |
| Revolutions per mile | 560 (348 per km) |
| Closest metric size | 390/50R20 |
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" | -2.78% | -76 mm | 58.3 mph | calculate → |
| 37x12.50R20 | 37.00" | +2.78% | -76 mm | 61.7 mph | calculate → |
| 37x13.50R20 | 37.00" | +2.78% | -51 mm | 61.7 mph | calculate → |
| 295/65R20 | 35.10" | -2.50% | -99 mm | 58.5 mph | calculate → |
| 285/65R20 | 34.59" | -3.93% | -109 mm | 57.6 mph | calculate → |
| 325/60R20 | 35.35" | -1.79% | -69 mm | 58.9 mph | calculate → |
| 35x11.50R20 | 35.00" | -2.78% | -102 mm | 58.3 mph | calculate → |
| 35x13.50R20 | 35.00" | -2.78% | -51 mm | 58.3 mph | calculate → |
| 315/60R20 | 34.88" | -3.11% | -79 mm | 58.1 mph | calculate → |
| 37x11.50R20 | 37.00" | +2.78% | -102 mm | 61.7 mph | calculate → |
| 35x15.50R20 | 35.00" | -2.78% | 0 mm | 58.3 mph | calculate → |
| 36x13.50R20 | 36.00" | 0.00% | -51 mm | 60.0 mph | calculate → |
| 375/55R20 | 36.24" | +0.67% | -19 mm | 60.4 mph | calculate → |
| 285/70R20 | 35.71" | -0.81% | -109 mm | 59.5 mph | calculate → |
| 35x13.00R20 | 35.00" | -2.78% | -64 mm | 58.3 mph | calculate → |
| 35x14.50R20 | 35.00" | -2.78% | -26 mm | 58.3 mph | calculate → |
| 37x14.50R20 | 37.00" | +2.78% | -26 mm | 61.7 mph | calculate → |
| 305/60R20 | 34.41" | -4.42% | -89 mm | 57.3 mph | calculate → |
| 345/60R20 | 36.30" | +0.83% | -49 mm | 60.5 mph | calculate → |
| 355/60R20 | 36.77" | +2.14% | -39 mm | 61.3 mph | calculate → |
Try another size against 36x15.50R20
Questions
What size is 36x15.50R20 in inches?
36x15.50R20 is about 36.0" tall and 15.5" wide on a 20-inch rim — roughly a 390/50R20 in inch sizing.
What does 36x15.50R20 mean?
36" overall diameter, 15.50" section width, radial, 20" rim.
What tire sizes are equivalent to 36x15.50R20?
On the same 20" rim, within 3% of the diameter: 36x13.50R20 (0.00%), 375/55R20 (+0.67%), 285/70R20 (-0.81%), 345/60R20 (+0.83%), 325/60R20 (-1.79%), 355/60R20 (+2.14%).
How many revolutions per mile does a 36x15.50R20 tire make?
About 560 revolutions per mile (circumference 113.1").
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.