Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/70-20 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.81 (935) | 34.07 (865.5) | -2.74 (-69.5) -7.4% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 115.65 (2937.39) | 107.05 (2719.05) | -8.6 (-218.34) -7.4% |
| Sidewall Height inches (mm) | 8.41 (213.5) | 7.04 (178.75) | -1.37 (-34.75) -16.3% |
| Revolutions per mile (km) | 547.88 (340.44) | 591.88 (367.78) | 44 (27.34) 8% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.51 mph (29.79 km/h) |
| 25 mph (40.23 km/h) | 23.14 mph (37.24 km/h) |
| 30 mph (48.28 km/h) | 27.77 mph (44.69 km/h) |
| 35 mph (56.33 km/h) | 32.4 mph (52.14 km/h) |
| 40 mph (64.37 km/h) | 37.03 mph (59.59 km/h) |
| 45 mph (72.42 km/h) | 41.66 mph (67.04 km/h) |
| 50 mph (80.47 km/h) | 46.28 mph (74.49 km/h) |
| 55 mph (88.51 km/h) | 50.91 mph (81.93 km/h) |
| 60 mph (96.56 km/h) | 55.54 mph (89.38 km/h) |
| 65 mph (104.61 km/h) | 60.17 mph (96.83 km/h) |
| 70 mph (112.65 km/h) | 64.8 mph (104.28 km/h) |
| 75 mph (120.7 km/h) | 69.43 mph (111.73 km/h) |
| 80 mph (128.75 km/h) | 74.05 mph (119.18 km/h) |
| 85 mph (136.79 km/h) | 78.68 mph (126.63 km/h) |
| 90 mph (144.84 km/h) | 83.31 mph (134.07 km/h) |
| 95 mph (152.89 km/h) | 87.94 mph (141.52 km/h) |
| 100 mph (160.93 km/h) | 92.57 mph (148.97 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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