Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/70-20 | 275/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.81 (935) | 32.99 (838) | -3.82 (-97) -10.4% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 115.65 (2937.39) | 103.65 (2632.65) | -12 (-304.73) -10.4% |
| Sidewall Height inches (mm) | 8.41 (213.5) | 6.5 (165) | -1.91 (-48.5) -22.7% |
| Revolutions per mile (km) | 547.88 (340.44) | 611.3 (379.84) | 63.42 (39.41) 11.6% |
275/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.93 mph (28.85 km/h) |
| 25 mph (40.23 km/h) | 22.41 mph (36.06 km/h) |
| 30 mph (48.28 km/h) | 26.89 mph (43.27 km/h) |
| 35 mph (56.33 km/h) | 31.37 mph (50.48 km/h) |
| 40 mph (64.37 km/h) | 35.85 mph (57.7 km/h) |
| 45 mph (72.42 km/h) | 40.33 mph (64.91 km/h) |
| 50 mph (80.47 km/h) | 44.81 mph (72.12 km/h) |
| 55 mph (88.51 km/h) | 49.29 mph (79.33 km/h) |
| 60 mph (96.56 km/h) | 53.78 mph (86.54 km/h) |
| 65 mph (104.61 km/h) | 58.26 mph (93.76 km/h) |
| 70 mph (112.65 km/h) | 62.74 mph (100.97 km/h) |
| 75 mph (120.7 km/h) | 67.22 mph (108.18 km/h) |
| 80 mph (128.75 km/h) | 71.7 mph (115.39 km/h) |
| 85 mph (136.79 km/h) | 76.18 mph (122.6 km/h) |
| 90 mph (144.84 km/h) | 80.66 mph (129.81 km/h) |
| 95 mph (152.89 km/h) | 85.14 mph (137.03 km/h) |
| 100 mph (160.93 km/h) | 89.63 mph (144.24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1556 | 1807 | 1946 | 2032 | 2125 | 2191 | 2264 | 2350 | 2469 | 2588 | 2721 | 2827 | 3019 | 3230 | 3396 | 3502 | 3561 | 3780 | 4084 | 4746 |
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