Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/60-18 | 275/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.46 (799.2) | 32.99 (838) | 1.53 (38.8) 4.9% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 98.85 (2510.76) | 103.65 (2632.65) | 4.8 (121.89) 4.9% |
| Sidewall Height inches (mm) | 6.73 (171) | 6.5 (165) | -0.24 (-6) -3.5% |
| Revolutions per mile (km) | 640.98 (398.28) | 611.3 (379.84) | -29.68 (-18.44) -4.6% |
275/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.97 mph (33.75 km/h) |
| 25 mph (40.23 km/h) | 26.21 mph (42.19 km/h) |
| 30 mph (48.28 km/h) | 31.46 mph (50.62 km/h) |
| 35 mph (56.33 km/h) | 36.7 mph (59.06 km/h) |
| 40 mph (64.37 km/h) | 41.94 mph (67.5 km/h) |
| 45 mph (72.42 km/h) | 47.18 mph (75.94 km/h) |
| 50 mph (80.47 km/h) | 52.43 mph (84.37 km/h) |
| 55 mph (88.51 km/h) | 57.67 mph (92.81 km/h) |
| 60 mph (96.56 km/h) | 62.91 mph (101.25 km/h) |
| 65 mph (104.61 km/h) | 68.16 mph (109.69 km/h) |
| 70 mph (112.65 km/h) | 73.4 mph (118.12 km/h) |
| 75 mph (120.7 km/h) | 78.64 mph (126.56 km/h) |
| 80 mph (128.75 km/h) | 83.88 mph (135 km/h) |
| 85 mph (136.79 km/h) | 89.13 mph (143.44 km/h) |
| 90 mph (144.84 km/h) | 94.37 mph (151.87 km/h) |
| 95 mph (152.89 km/h) | 99.61 mph (160.31 km/h) |
| 100 mph (160.93 km/h) | 104.85 mph (168.75 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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