37x12.50R16 tire size
37x12.50R16 is a flotation (inch) size: 37.0" tall, 12.5" wide, on a 16" rim — about a 320/85R16. The sidewall is 10.5" and the tire turns 545 times per mile.
37x12.50R16 specs
| Overall diameter (height) | 37.00" · 940 mm |
|---|---|
| Section width | 12.50" · 318 mm |
| Sidewall height | 10.50" · 267 mm (84% of width) |
| Rim diameter | 16" |
| Circumference | 116.24" · 2.952 m |
| Revolutions per mile | 545 (339 per km) |
| Closest metric size | 320/85R16 |
Equivalent sizes on a 16" 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 | |
|---|---|---|---|---|---|
| 38.5x14.50R16 | 38.50" | +4.05% | +50 mm | 62.4 mph | calculate → |
| 385/70R16 | 37.22" | +0.60% | +67 mm | 60.4 mph | calculate → |
| 36x12.50R16 | 36.00" | -2.70% | 0 mm | 58.4 mph | calculate → |
| 36x13.50R16 | 36.00" | -2.70% | +25 mm | 58.4 mph | calculate → |
| 37x13.50R16 | 37.00" | 0.00% | +25 mm | 60.0 mph | calculate → |
| 37x13.00R16 | 37.00" | 0.00% | +12 mm | 60.0 mph | calculate → |
| 37x14.50R16 | 37.00" | 0.00% | +50 mm | 60.0 mph | calculate → |
| 37x14.00R16 | 37.00" | 0.00% | +38 mm | 60.0 mph | calculate → |
| 365/75R16 | 37.56" | +1.50% | +47 mm | 60.9 mph | calculate → |
| 345/75R16 | 36.37" | -1.69% | +27 mm | 59.0 mph | calculate → |
| 36x13.00R16 | 36.00" | -2.70% | +12 mm | 58.4 mph | calculate → |
| 36x14.50R16 | 36.00" | -2.70% | +50 mm | 58.4 mph | calculate → |
| 38x13.00R16 | 38.00" | +2.70% | +12 mm | 61.6 mph | calculate → |
| 38x15.50R16 | 38.00" | +2.70% | +76 mm | 61.6 mph | calculate → |
| 38.5x11.00R16 | 38.50" | +4.05% | -39 mm | 62.4 mph | calculate → |
| 38.5x13.50R16 | 38.50" | +4.05% | +25 mm | 62.4 mph | calculate → |
| 38.5x15.00R16 | 38.50" | +4.05% | +63 mm | 62.4 mph | calculate → |
| 325/80R16 | 36.47" | -1.43% | +7 mm | 59.1 mph | calculate → |
| 395/70R16 | 37.77" | +2.09% | +77 mm | 61.3 mph | calculate → |
| 38x14.50R16 | 38.00" | +2.70% | +50 mm | 61.6 mph | calculate → |
| 375/65R16 | 35.19" | -4.88% | +57 mm | 57.1 mph | calculate → |
Plus / minus sizing: 15" and 17" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 37x12.50R17 common | 37.00" | 0.00% | 0 mm | 60.0 mph | calculate → |
| 37x13.50R17 | 37.00" | 0.00% | +25 mm | 60.0 mph | calculate → |
| 37x12.50R15 | 37.00" | 0.00% | 0 mm | 60.0 mph | calculate → |
| 37x14.50R15 | 37.00" | 0.00% | +50 mm | 60.0 mph | calculate → |
| 37x11.50R17 | 37.00" | 0.00% | -26 mm | 60.0 mph | calculate → |
| 37x13.50R15 | 37.00" | 0.00% | +25 mm | 60.0 mph | calculate → |
| 37x13.00R15 | 37.00" | 0.00% | +12 mm | 60.0 mph | calculate → |
| 37x13.00R17 | 37.00" | 0.00% | +12 mm | 60.0 mph | calculate → |
| 37x14.00R15 | 37.00" | 0.00% | +38 mm | 60.0 mph | calculate → |
| 37x14.00R17 | 37.00" | 0.00% | +38 mm | 60.0 mph | calculate → |
Try another size against 37x12.50R16
Questions
What size is 37x12.50R16 in inches?
37x12.50R16 is about 37.0" tall and 12.5" wide on a 16-inch rim — roughly a 320/85R16 in inch sizing.
What does 37x12.50R16 mean?
37" overall diameter, 12.50" section width, radial, 16" rim.
What tire sizes are equivalent to 37x12.50R16?
On the same 16" rim, within 3% of the diameter: 37x13.50R16 (0.00%), 37x13.00R16 (0.00%), 37x14.50R16 (0.00%), 37x14.00R16 (0.00%), 385/70R16 (+0.60%), 325/80R16 (-1.43%).
How many revolutions per mile does a 37x12.50R16 tire make?
About 545 revolutions per mile (circumference 116.2").
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.