Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/70-20 | 285/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.71 (907) | 34.59 (878.5) | -1.12 (-28.5) -3.1% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 112.18 (2849.42) | 108.66 (2759.89) | -3.53 (-89.54) -3.1% |
| Sidewall Height inches (mm) | 7.85 (199.5) | 7.29 (185.25) | -0.56 (-14.25) -7.1% |
| Revolutions per mile (km) | 564.8 (350.95) | 583.12 (362.33) | 18.32 (11.39) 3.2% |
285/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.37 mph (31.18 km/h) |
| 25 mph (40.23 km/h) | 24.21 mph (38.97 km/h) |
| 30 mph (48.28 km/h) | 29.06 mph (46.76 km/h) |
| 35 mph (56.33 km/h) | 33.9 mph (54.56 km/h) |
| 40 mph (64.37 km/h) | 38.74 mph (62.35 km/h) |
| 45 mph (72.42 km/h) | 43.59 mph (70.14 km/h) |
| 50 mph (80.47 km/h) | 48.43 mph (77.94 km/h) |
| 55 mph (88.51 km/h) | 53.27 mph (85.73 km/h) |
| 60 mph (96.56 km/h) | 58.11 mph (93.53 km/h) |
| 65 mph (104.61 km/h) | 62.96 mph (101.32 km/h) |
| 70 mph (112.65 km/h) | 67.8 mph (109.11 km/h) |
| 75 mph (120.7 km/h) | 72.64 mph (116.91 km/h) |
| 80 mph (128.75 km/h) | 77.49 mph (124.7 km/h) |
| 85 mph (136.79 km/h) | 82.33 mph (132.5 km/h) |
| 90 mph (144.84 km/h) | 87.17 mph (140.29 km/h) |
| 95 mph (152.89 km/h) | 92.01 mph (148.08 km/h) |
| 100 mph (160.93 km/h) | 96.86 mph (155.88 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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