36x12.50R15 tire size
36x12.50R15 is a flotation (inch) size: 36.0" tall, 12.5" wide, on a 15" rim — about a 320/85R15. The sidewall is 10.5" and the tire turns 560 times per mile.
36x12.50R15 specs
| Overall diameter (height) | 36.00" · 914 mm |
|---|---|
| Section width | 12.50" · 318 mm |
| Sidewall height | 10.50" · 267 mm (84% of width) |
| Rim diameter | 15" |
| Circumference | 113.10" · 2.873 m |
| Revolutions per mile | 560 (348 per km) |
| Closest metric size | 320/85R15 |
Equivalent sizes on a 15" 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 | |
|---|---|---|---|---|---|
| 35x12.50R15 | 35.00" | -2.78% | 0 mm | 58.3 mph | calculate → |
| 35x14.50R15 | 35.00" | -2.78% | +50 mm | 58.3 mph | calculate → |
| 37x12.50R15 | 37.00" | +2.78% | 0 mm | 61.7 mph | calculate → |
| 36x13.50R15 | 36.00" | 0.00% | +25 mm | 60.0 mph | calculate → |
| 35x10.50R15 | 35.00" | -2.78% | -51 mm | 58.3 mph | calculate → |
| 35x13.50R15 | 35.00" | -2.78% | +25 mm | 58.3 mph | calculate → |
| 37x14.50R15 | 37.00" | +2.78% | +50 mm | 61.7 mph | calculate → |
| 36x14.50R15 | 36.00" | 0.00% | +50 mm | 60.0 mph | calculate → |
| 35x11.50R15 | 35.00" | -2.78% | -26 mm | 58.3 mph | calculate → |
| 35x11.00R15 | 35.00" | -2.78% | -39 mm | 58.3 mph | calculate → |
| 35x15.50R15 | 35.00" | -2.78% | +76 mm | 58.3 mph | calculate → |
| 35x15.00R15 | 35.00" | -2.78% | +63 mm | 58.3 mph | calculate → |
| 35x16.00R15 | 35.00" | -2.78% | +88 mm | 58.3 mph | calculate → |
| 37x13.50R15 | 37.00" | +2.78% | +25 mm | 61.7 mph | calculate → |
| 37x13.00R15 | 37.00" | +2.78% | +12 mm | 61.7 mph | calculate → |
| 37x14.00R15 | 37.00" | +2.78% | +38 mm | 61.7 mph | calculate → |
Plus / minus sizing: 14" and 16" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 36x12.50R16 | 36.00" | 0.00% | 0 mm | 60.0 mph | calculate → |
| 36x13.50R16 | 36.00" | 0.00% | +25 mm | 60.0 mph | calculate → |
| 36x13.00R16 | 36.00" | 0.00% | +12 mm | 60.0 mph | calculate → |
| 36x14.50R16 | 36.00" | 0.00% | +50 mm | 60.0 mph | calculate → |
Try another size against 36x12.50R15
Questions
What size is 36x12.50R15 in inches?
36x12.50R15 is about 36.0" tall and 12.5" wide on a 15-inch rim — roughly a 320/85R15 in inch sizing.
What does 36x12.50R15 mean?
36" overall diameter, 12.50" section width, radial, 15" rim.
What tire sizes are equivalent to 36x12.50R15?
On the same 15" rim, within 3% of the diameter: 36x13.50R15 (0.00%), 36x14.50R15 (0.00%), 35x10.50R15 (-2.78%), 35x11.50R15 (-2.78%), 35x11.00R15 (-2.78%), 35x12.50R15 (-2.78%).
How many revolutions per mile does a 36x12.50R15 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.