Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/50-22 | 37/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.8 (883.8) | 37.03 (940.48) | 2.23 (56.68) 6.4% |
| Width inches (mm) | 12.8 (325) | 12.52 (318) | -0.28 (-7) -2.2% |
| Circum. inches (mm) | 109.31 (2776.54) | 116.32 (2954.61) | 7.01 (178.07) 6.4% |
| Sidewall Height inches (mm) | 6.4 (162.5) | 8.51 (216.24) | 2.12 (53.74) 33.1% |
| Revolutions per mile (km) | 579.62 (360.16) | 544.69 (338.45) | -34.93 (-21.71) -6% |
37/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.28 mph (34.25 km/h) |
| 25 mph (40.23 km/h) | 26.6 mph (42.81 km/h) |
| 30 mph (48.28 km/h) | 31.92 mph (51.38 km/h) |
| 35 mph (56.33 km/h) | 37.24 mph (59.94 km/h) |
| 40 mph (64.37 km/h) | 42.57 mph (68.5 km/h) |
| 45 mph (72.42 km/h) | 47.89 mph (77.07 km/h) |
| 50 mph (80.47 km/h) | 53.21 mph (85.63 km/h) |
| 55 mph (88.51 km/h) | 58.53 mph (94.19 km/h) |
| 60 mph (96.56 km/h) | 63.85 mph (102.75 km/h) |
| 65 mph (104.61 km/h) | 69.17 mph (111.32 km/h) |
| 70 mph (112.65 km/h) | 74.49 mph (119.88 km/h) |
| 75 mph (120.7 km/h) | 79.81 mph (128.44 km/h) |
| 80 mph (128.75 km/h) | 85.13 mph (137 km/h) |
| 85 mph (136.79 km/h) | 90.45 mph (145.57 km/h) |
| 90 mph (144.84 km/h) | 95.77 mph (154.13 km/h) |
| 95 mph (152.89 km/h) | 101.09 mph (162.69 km/h) |
| 100 mph (160.93 km/h) | 106.41 mph (171.26 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1386 | 1610 | 1734 | 1811 | 1893 | 1952 | 2017 | 2094 | 2200 | 2306 | 2424 | 2519 | 2690 | 2878 | 3026 | 3120 | 3173 | 3368 | 3639 | 4229 |
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