Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/50-20 | 33/11.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.22 (793) | 33.11 (840.88) | 1.89 (47.88) 6% |
| Width inches (mm) | 11.22 (285) | 11.5 (292) | 0.28 (7) 2.5% |
| Circum. inches (mm) | 98.08 (2491.28) | 104 (2641.7) | 5.92 (150.42) 6% |
| Sidewall Height inches (mm) | 5.61 (142.5) | 6.55 (166.44) | 0.94 (23.94) 16.8% |
| Revolutions per mile (km) | 645.99 (401.4) | 609.21 (378.54) | -36.78 (-22.86) -5.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.21 mph (34.13 km/h) |
| 25 mph (40.23 km/h) | 26.51 mph (42.66 km/h) |
| 30 mph (48.28 km/h) | 31.81 mph (51.2 km/h) |
| 35 mph (56.33 km/h) | 37.11 mph (59.73 km/h) |
| 40 mph (64.37 km/h) | 42.42 mph (68.26 km/h) |
| 45 mph (72.42 km/h) | 47.72 mph (76.79 km/h) |
| 50 mph (80.47 km/h) | 53.02 mph (85.33 km/h) |
| 55 mph (88.51 km/h) | 58.32 mph (93.86 km/h) |
| 60 mph (96.56 km/h) | 63.62 mph (102.39 km/h) |
| 65 mph (104.61 km/h) | 68.92 mph (110.92 km/h) |
| 70 mph (112.65 km/h) | 74.23 mph (119.46 km/h) |
| 75 mph (120.7 km/h) | 79.53 mph (127.99 km/h) |
| 80 mph (128.75 km/h) | 84.83 mph (136.52 km/h) |
| 85 mph (136.79 km/h) | 90.13 mph (145.05 km/h) |
| 90 mph (144.84 km/h) | 95.43 mph (153.59 km/h) |
| 95 mph (152.89 km/h) | 100.74 mph (162.12 km/h) |
| 100 mph (160.93 km/h) | 106.04 mph (170.65 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1550 | 1801 | 1940 | 2025 | 2118 | 2184 | 2256 | 2342 | 2461 | 2579 | 2711 | 2817 | 3008 | 3219 | 3384 | 3490 | 3549 | 3767 | 4070 | 4730 |
Better Fuel Economy Factory Ratios Increased Power
