Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/60-20 | 285/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.99 (838) | 34.59 (878.5) | 1.59 (40.5) 4.8% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 103.65 (2632.65) | 108.66 (2759.89) | 5.01 (127.23) 4.8% |
| Sidewall Height inches (mm) | 6.5 (165) | 7.29 (185.25) | 0.8 (20.25) 12.3% |
| Revolutions per mile (km) | 611.3 (379.84) | 583.12 (362.33) | -28.18 (-17.51) -4.6% |
285/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.97 mph (33.74 km/h) |
| 25 mph (40.23 km/h) | 26.21 mph (42.18 km/h) |
| 30 mph (48.28 km/h) | 31.45 mph (50.61 km/h) |
| 35 mph (56.33 km/h) | 36.69 mph (59.05 km/h) |
| 40 mph (64.37 km/h) | 41.93 mph (67.49 km/h) |
| 45 mph (72.42 km/h) | 47.17 mph (75.92 km/h) |
| 50 mph (80.47 km/h) | 52.42 mph (84.36 km/h) |
| 55 mph (88.51 km/h) | 57.66 mph (92.79 km/h) |
| 60 mph (96.56 km/h) | 62.9 mph (101.23 km/h) |
| 65 mph (104.61 km/h) | 68.14 mph (109.66 km/h) |
| 70 mph (112.65 km/h) | 73.38 mph (118.1 km/h) |
| 75 mph (120.7 km/h) | 78.62 mph (126.53 km/h) |
| 80 mph (128.75 km/h) | 83.87 mph (134.97 km/h) |
| 85 mph (136.79 km/h) | 89.11 mph (143.41 km/h) |
| 90 mph (144.84 km/h) | 94.35 mph (151.84 km/h) |
| 95 mph (152.89 km/h) | 99.59 mph (160.28 km/h) |
| 100 mph (160.93 km/h) | 104.83 mph (168.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1484 | 1724 | 1856 | 1939 | 2027 | 2090 | 2160 | 2242 | 2355 | 2469 | 2595 | 2696 | 2879 | 3082 | 3239 | 3340 | 3397 | 3606 | 3896 | 4528 |
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