Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/70-20 | 285/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.16 (893) | 34.59 (878.5) | -0.57 (-14.5) -1.6% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 110.45 (2805.44) | 108.66 (2759.89) | -1.79 (-45.55) -1.6% |
| Sidewall Height inches (mm) | 7.58 (192.5) | 7.29 (185.25) | -0.29 (-7.25) -3.8% |
| Revolutions per mile (km) | 573.65 (356.45) | 583.12 (362.33) | 9.47 (5.88) 1.7% |
285/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.68 mph (31.66 km/h) |
| 25 mph (40.23 km/h) | 24.59 mph (39.58 km/h) |
| 30 mph (48.28 km/h) | 29.51 mph (47.5 km/h) |
| 35 mph (56.33 km/h) | 34.43 mph (55.41 km/h) |
| 40 mph (64.37 km/h) | 39.35 mph (63.33 km/h) |
| 45 mph (72.42 km/h) | 44.27 mph (71.24 km/h) |
| 50 mph (80.47 km/h) | 49.19 mph (79.16 km/h) |
| 55 mph (88.51 km/h) | 54.11 mph (87.08 km/h) |
| 60 mph (96.56 km/h) | 59.03 mph (94.99 km/h) |
| 65 mph (104.61 km/h) | 63.94 mph (102.91 km/h) |
| 70 mph (112.65 km/h) | 68.86 mph (110.83 km/h) |
| 75 mph (120.7 km/h) | 73.78 mph (118.74 km/h) |
| 80 mph (128.75 km/h) | 78.7 mph (126.66 km/h) |
| 85 mph (136.79 km/h) | 83.62 mph (134.57 km/h) |
| 90 mph (144.84 km/h) | 88.54 mph (142.49 km/h) |
| 95 mph (152.89 km/h) | 93.46 mph (150.41 km/h) |
| 100 mph (160.93 km/h) | 98.38 mph (158.32 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 |
Better Fuel Economy Factory Ratios Increased Power
