Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/80-20 | 37/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.58 (980) | 37.03 (940.48) | -1.56 (-39.52) -4% |
| Width inches (mm) | 11.61 (295) | 12.52 (318) | 0.91 (23) 7.8% |
| Circum. inches (mm) | 121.21 (3078.76) | 116.32 (2954.61) | -4.89 (-124.16) -4% |
| Sidewall Height inches (mm) | 9.29 (236) | 8.51 (216.24) | -0.78 (-19.76) -8.4% |
| Revolutions per mile (km) | 522.72 (324.81) | 544.69 (338.45) | 21.97 (13.65) 4.2% |
37/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.19 mph (30.89 km/h) |
| 25 mph (40.23 km/h) | 23.99 mph (38.61 km/h) |
| 30 mph (48.28 km/h) | 28.79 mph (46.33 km/h) |
| 35 mph (56.33 km/h) | 33.59 mph (54.06 km/h) |
| 40 mph (64.37 km/h) | 38.39 mph (61.78 km/h) |
| 45 mph (72.42 km/h) | 43.19 mph (69.5 km/h) |
| 50 mph (80.47 km/h) | 47.98 mph (77.22 km/h) |
| 55 mph (88.51 km/h) | 52.78 mph (84.94 km/h) |
| 60 mph (96.56 km/h) | 57.58 mph (92.67 km/h) |
| 65 mph (104.61 km/h) | 62.38 mph (100.39 km/h) |
| 70 mph (112.65 km/h) | 67.18 mph (108.11 km/h) |
| 75 mph (120.7 km/h) | 71.98 mph (115.83 km/h) |
| 80 mph (128.75 km/h) | 76.77 mph (123.56 km/h) |
| 85 mph (136.79 km/h) | 81.57 mph (131.28 km/h) |
| 90 mph (144.84 km/h) | 86.37 mph (139 km/h) |
| 95 mph (152.89 km/h) | 91.17 mph (146.72 km/h) |
| 100 mph (160.93 km/h) | 95.97 mph (154.44 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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