34x12.50R15 tire size
34x12.50R15 is a flotation (inch) size: 34.0" tall, 12.5" wide, on a 15" rim — about a 320/75R15. The sidewall is 9.5" and the tire turns 593 times per mile.
34x12.50R15 specs
| Overall diameter (height) | 34.00" · 864 mm |
|---|---|
| Section width | 12.50" · 318 mm |
| Sidewall height | 9.50" · 241 mm (76% of width) |
| Rim diameter | 15" |
| Circumference | 106.81" · 2.713 m |
| Revolutions per mile | 593 (369 per km) |
| Closest metric size | 320/75R15 |
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 | |
|---|---|---|---|---|---|
| 33x12.50R15 | 33.00" | -2.94% | 0 mm | 58.2 mph | calculate → |
| 35x12.50R15 | 35.00" | +2.94% | 0 mm | 61.8 mph | calculate → |
| 33x10.50R15 | 33.00" | -2.94% | -51 mm | 58.2 mph | calculate → |
| 35x14.50R15 | 35.00" | +2.94% | +50 mm | 61.8 mph | calculate → |
| 33x13.50R15 | 33.00" | -2.94% | +25 mm | 58.2 mph | calculate → |
| 33x14.50R15 | 33.00" | -2.94% | +50 mm | 58.2 mph | calculate → |
| 35x10.50R15 | 35.00" | +2.94% | -51 mm | 61.8 mph | calculate → |
| 35x13.50R15 | 35.00" | +2.94% | +25 mm | 61.8 mph | calculate → |
| 34x10.50R15 | 34.00" | 0.00% | -51 mm | 60.0 mph | calculate → |
| 33x11.50R15 | 33.00" | -2.94% | -26 mm | 58.2 mph | calculate → |
| 33x13.00R15 | 33.00" | -2.94% | +12 mm | 58.2 mph | calculate → |
| 33x14.00R15 | 33.00" | -2.94% | +38 mm | 58.2 mph | calculate → |
| 33x15.50R15 | 33.00" | -2.94% | +76 mm | 58.2 mph | calculate → |
| 33x16.50R15 | 33.00" | -2.94% | +101 mm | 58.2 mph | calculate → |
| 33x22.00R15 | 33.00" | -2.94% | +241 mm | 58.2 mph | calculate → |
| 33x9.50R15 | 33.00" | -2.94% | -77 mm | 58.2 mph | calculate → |
| 35x11.50R15 | 35.00" | +2.94% | -26 mm | 61.8 mph | calculate → |
| 35x11.00R15 | 35.00" | +2.94% | -39 mm | 61.8 mph | calculate → |
| 35x15.50R15 | 35.00" | +2.94% | +76 mm | 61.8 mph | calculate → |
| 35x15.00R15 | 35.00" | +2.94% | +63 mm | 61.8 mph | calculate → |
| 35x16.00R15 | 35.00" | +2.94% | +88 mm | 61.8 mph | calculate → |
| 34x9.50R15 | 34.00" | 0.00% | -77 mm | 60.0 mph | calculate → |
| 33x19.50R15 | 33.00" | -2.94% | +177 mm | 58.2 mph | calculate → |
| 33x21.50R15 | 33.00" | -2.94% | +228 mm | 58.2 mph | calculate → |
| 33x9.00R15 | 33.00" | -2.94% | -89 mm | 58.2 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 | |
|---|---|---|---|---|---|
| 34x10.50R16 | 34.00" | 0.00% | -51 mm | 60.0 mph | calculate → |
| 34x12.50R16 | 34.00" | 0.00% | 0 mm | 60.0 mph | calculate → |
| 34x13.50R16 | 34.00" | 0.00% | +25 mm | 60.0 mph | calculate → |
| 34x9.00R16 | 34.00" | 0.00% | -89 mm | 60.0 mph | calculate → |
Try another size against 34x12.50R15
Questions
What size is 34x12.50R15 in inches?
34x12.50R15 is about 34.0" tall and 12.5" wide on a 15-inch rim — roughly a 320/75R15 in inch sizing.
What does 34x12.50R15 mean?
34" overall diameter, 12.50" section width, radial, 15" rim.
What tire sizes are equivalent to 34x12.50R15?
On the same 15" rim, within 3% of the diameter: 34x10.50R15 (0.00%), 34x9.50R15 (0.00%), 33x10.50R15 (-2.94%), 33x11.50R15 (-2.94%), 33x12.50R15 (-2.94%), 33x13.50R15 (-2.94%).
How many revolutions per mile does a 34x12.50R15 tire make?
About 593 revolutions per mile (circumference 106.8").
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.