43x15.00R20 tire size
43x15.00R20 is a flotation (inch) size: 43.0" tall, 15.0" wide, on a 20" rim — about a 380/75R20. The sidewall is 11.5" and the tire turns 469 times per mile.
43x15.00R20 specs
| Overall diameter (height) | 43.00" · 1092 mm |
|---|---|
| Section width | 15.00" · 381 mm |
| Sidewall height | 11.50" · 292 mm (77% of width) |
| Rim diameter | 20" |
| Circumference | 135.09" · 3.431 m |
| Revolutions per mile | 469 (291 per km) |
| Closest metric size | 380/75R20 |
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 | |
|---|---|---|---|---|---|
| 42x14.50R20 | 42.00" | -2.33% | -13 mm | 58.6 mph | calculate → |
| 42x13.50R20 | 42.00" | -2.33% | -38 mm | 58.6 mph | calculate → |
| 43x14.50R20 | 43.00" | 0.00% | -13 mm | 60.0 mph | calculate → |
| 42.5x13.50R20 | 42.50" | -1.16% | -38 mm | 59.3 mph | calculate → |
| 42x15.00R20 | 42.00" | -2.33% | 0 mm | 58.6 mph | calculate → |
| 44x13.50R20 | 44.00" | +2.33% | -38 mm | 61.4 mph | calculate → |
| 44x19.50R20 | 44.00" | +2.33% | +114 mm | 61.4 mph | calculate → |
| 41x14.50R20 | 41.00" | -4.65% | -13 mm | 57.2 mph | calculate → |
| 45x14.50R20 | 45.00" | +4.65% | -13 mm | 62.8 mph | calculate → |
| 44x21.00R20 | 44.00" | +2.33% | +152 mm | 61.4 mph | calculate → |
Try another size against 43x15.00R20
Questions
What size is 43x15.00R20 in inches?
43x15.00R20 is about 43.0" tall and 15.0" wide on a 20-inch rim — roughly a 380/75R20 in inch sizing.
What does 43x15.00R20 mean?
43" overall diameter, 15.00" section width, radial, 20" rim.
What tire sizes are equivalent to 43x15.00R20?
On the same 20" rim, within 3% of the diameter: 43x14.50R20 (0.00%), 42.5x13.50R20 (-1.16%), 42x13.50R20 (-2.33%), 42x14.50R20 (-2.33%), 42x15.00R20 (-2.33%), 44x13.50R20 (+2.33%).
How many revolutions per mile does a 43x15.00R20 tire make?
About 469 revolutions per mile (circumference 135.1").
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.