Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/80-20 | 37/13.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 42.99 (1092) | 37.01 (940.18) | -5.98 (-151.82) -13.9% |
| Width inches (mm) | 14.37 (365) | 13.5 (343) | -0.87 (-22) -6% |
| Circum. inches (mm) | 135.06 (3430.62) | 116.29 (2953.66) | -18.78 (-476.96) -13.9% |
| Sidewall Height inches (mm) | 11.5 (292) | 8.51 (216.09) | -2.99 (-75.91) -26% |
| Revolutions per mile (km) | 469.11 (291.49) | 544.86 (338.56) | 75.75 (47.07) 16.1% |
37/13.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.22 mph (27.71 km/h) |
| 25 mph (40.23 km/h) | 21.52 mph (34.64 km/h) |
| 30 mph (48.28 km/h) | 25.83 mph (41.57 km/h) |
| 35 mph (56.33 km/h) | 30.13 mph (48.5 km/h) |
| 40 mph (64.37 km/h) | 34.44 mph (55.42 km/h) |
| 45 mph (72.42 km/h) | 38.74 mph (62.35 km/h) |
| 50 mph (80.47 km/h) | 43.05 mph (69.28 km/h) |
| 55 mph (88.51 km/h) | 47.35 mph (76.21 km/h) |
| 60 mph (96.56 km/h) | 51.66 mph (83.14 km/h) |
| 65 mph (104.61 km/h) | 55.96 mph (90.06 km/h) |
| 70 mph (112.65 km/h) | 60.27 mph (96.99 km/h) |
| 75 mph (120.7 km/h) | 64.57 mph (103.92 km/h) |
| 80 mph (128.75 km/h) | 68.88 mph (110.85 km/h) |
| 85 mph (136.79 km/h) | 73.18 mph (117.78 km/h) |
| 90 mph (144.84 km/h) | 77.49 mph (124.7 km/h) |
| 95 mph (152.89 km/h) | 81.79 mph (131.63 km/h) |
| 100 mph (160.93 km/h) | 86.1 mph (138.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1387 | 1611 | 1735 | 1811 | 1894 | 1953 | 2018 | 2095 | 2201 | 2307 | 2425 | 2519 | 2691 | 2879 | 3027 | 3121 | 3174 | 3369 | 3640 | 4231 |
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