325/80R16 tire size
325/80R16 is a metric size: 36.5" tall, 12.8" wide, on a 16" rim — about a 36.5x13.00R16. The sidewall is 10.2" and the tire turns 553 times per mile.
325/80R16 specs
| Overall diameter (height) | 36.47" · 926 mm |
|---|---|
| Section width | 12.80" · 325 mm |
| Sidewall height | 10.24" · 260 mm (80% of width) |
| Rim diameter | 16" |
| Circumference | 114.58" · 2.910 m |
| Revolutions per mile | 553 (344 per km) |
| Inch (flotation) equivalent | 36.5x13.00R16 |
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 | |
|---|---|---|---|---|---|
| 35x12.50R16 | 35.00" | -4.04% | -7 mm | 57.6 mph | calculate → |
| 37x12.50R16 | 37.00" | +1.45% | -7 mm | 60.9 mph | calculate → |
| 36x12.50R16 | 36.00" | -1.30% | -7 mm | 59.2 mph | calculate → |
| 36x13.50R16 | 36.00" | -1.30% | +18 mm | 59.2 mph | calculate → |
| 385/70R16 | 37.22" | +2.05% | +60 mm | 61.2 mph | calculate → |
| 35x10.50R16 | 35.00" | -4.04% | -58 mm | 57.6 mph | calculate → |
| 35x14.50R16 | 35.00" | -4.04% | +43 mm | 57.6 mph | calculate → |
| 345/75R16 | 36.37" | -0.27% | +20 mm | 59.8 mph | calculate → |
| 36x13.00R16 | 36.00" | -1.30% | +5 mm | 59.2 mph | calculate → |
| 36x14.50R16 | 36.00" | -1.30% | +43 mm | 59.2 mph | calculate → |
| 37x13.50R16 | 37.00" | +1.45% | +18 mm | 60.9 mph | calculate → |
| 37x13.00R16 | 37.00" | +1.45% | +5 mm | 60.9 mph | calculate → |
| 37x14.50R16 | 37.00" | +1.45% | +43 mm | 60.9 mph | calculate → |
| 37x14.00R16 | 37.00" | +1.45% | +31 mm | 60.9 mph | calculate → |
| 365/75R16 | 37.56" | +2.97% | +40 mm | 61.8 mph | calculate → |
| 35x11.50R16 | 35.00" | -4.04% | -33 mm | 57.6 mph | calculate → |
| 35x15.00R16 | 35.00" | -4.04% | +56 mm | 57.6 mph | calculate → |
| 35x16.00R16 | 35.00" | -4.04% | +81 mm | 57.6 mph | calculate → |
| 38x13.00R16 | 38.00" | +4.19% | +5 mm | 62.5 mph | calculate → |
| 38x15.50R16 | 38.00" | +4.19% | +69 mm | 62.5 mph | calculate → |
| 375/65R16 | 35.19" | -3.51% | +50 mm | 57.9 mph | calculate → |
| 395/70R16 | 37.77" | +3.56% | +70 mm | 62.1 mph | calculate → |
| 38x14.50R16 | 38.00" | +4.19% | +43 mm | 62.5 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 | |
|---|---|---|---|---|---|
| 355/70R17 | 36.57" | +0.26% | +30 mm | 60.2 mph | calculate → |
Try another size against 325/80R16
Questions
What size is 325/80R16 in inches?
325/80R16 is about 36.5" tall and 12.8" wide on a 16-inch rim — roughly a 36.5x13.00R16 in inch sizing.
What does 325/80R16 mean?
325 mm section width, sidewall 80% of the width (10.24"), radial construction, 16-inch rim.
What tire sizes are equivalent to 325/80R16?
On the same 16" rim, within 3% of the diameter: 345/75R16 (-0.27%), 36x12.50R16 (-1.30%), 36x13.50R16 (-1.30%), 36x13.00R16 (-1.30%), 36x14.50R16 (-1.30%), 37x12.50R16 (+1.45%).
How many revolutions per mile does a 325/80R16 tire make?
About 553 revolutions per mile (circumference 114.6").
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.