Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 37/13.5-20 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.01 (940.18) | 34.07 (865.5) | -2.94 (-74.68) -7.9% |
| Width inches (mm) | 13.5 (343) | 10.83 (275) | -2.68 (-68) -19.8% |
| Circum. inches (mm) | 116.29 (2953.66) | 107.05 (2719.05) | -9.24 (-234.61) -7.9% |
| Sidewall Height inches (mm) | 8.51 (216.09) | 7.04 (178.75) | -1.47 (-37.34) -17.3% |
| Revolutions per mile (km) | 544.86 (338.56) | 591.88 (367.78) | 47.01 (29.21) 8.6% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.41 mph (29.63 km/h) |
| 25 mph (40.23 km/h) | 23.01 mph (37.04 km/h) |
| 30 mph (48.28 km/h) | 27.62 mph (44.45 km/h) |
| 35 mph (56.33 km/h) | 32.22 mph (51.85 km/h) |
| 40 mph (64.37 km/h) | 36.82 mph (59.26 km/h) |
| 45 mph (72.42 km/h) | 41.43 mph (66.67 km/h) |
| 50 mph (80.47 km/h) | 46.03 mph (74.08 km/h) |
| 55 mph (88.51 km/h) | 50.63 mph (81.48 km/h) |
| 60 mph (96.56 km/h) | 55.23 mph (88.89 km/h) |
| 65 mph (104.61 km/h) | 59.84 mph (96.3 km/h) |
| 70 mph (112.65 km/h) | 64.44 mph (103.71 km/h) |
| 75 mph (120.7 km/h) | 69.04 mph (111.11 km/h) |
| 80 mph (128.75 km/h) | 73.65 mph (118.52 km/h) |
| 85 mph (136.79 km/h) | 78.25 mph (125.93 km/h) |
| 90 mph (144.84 km/h) | 82.85 mph (133.34 km/h) |
| 95 mph (152.89 km/h) | 87.45 mph (140.74 km/h) |
| 100 mph (160.93 km/h) | 92.06 mph (148.15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1506 | 1750 | 1884 | 1968 | 2057 | 2122 | 2192 | 2275 | 2391 | 2506 | 2634 | 2737 | 2923 | 3128 | 3288 | 3391 | 3448 | 3660 | 3955 | 4596 |
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