Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/30-19 | 385/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.73 (653.6) | 35.16 (893) | 9.43 (239.4) 36.6% |
| Width inches (mm) | 11.22 (285) | 15.16 (385) | 3.94 (100) 35.1% |
| Circum. inches (mm) | 80.84 (2053.34) | 110.45 (2805.44) | 29.61 (752.1) 36.6% |
| Sidewall Height inches (mm) | 3.37 (85.5) | 7.58 (192.5) | 4.21 (107) 125.1% |
| Revolutions per mile (km) | 783.77 (487.01) | 573.65 (356.45) | -210.12 (-130.56) -26.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.33 mph (43.98 km/h) |
| 25 mph (40.23 km/h) | 34.16 mph (54.97 km/h) |
| 30 mph (48.28 km/h) | 40.99 mph (65.96 km/h) |
| 35 mph (56.33 km/h) | 47.82 mph (76.96 km/h) |
| 40 mph (64.37 km/h) | 54.65 mph (87.95 km/h) |
| 45 mph (72.42 km/h) | 61.48 mph (98.95 km/h) |
| 50 mph (80.47 km/h) | 68.31 mph (109.94 km/h) |
| 55 mph (88.51 km/h) | 75.15 mph (120.93 km/h) |
| 60 mph (96.56 km/h) | 81.98 mph (131.93 km/h) |
| 65 mph (104.61 km/h) | 88.81 mph (142.92 km/h) |
| 70 mph (112.65 km/h) | 95.64 mph (153.92 km/h) |
| 75 mph (120.7 km/h) | 102.47 mph (164.91 km/h) |
| 80 mph (128.75 km/h) | 109.3 mph (175.91 km/h) |
| 85 mph (136.79 km/h) | 116.13 mph (186.9 km/h) |
| 90 mph (144.84 km/h) | 122.97 mph (197.89 km/h) |
| 95 mph (152.89 km/h) | 129.8 mph (208.89 km/h) |
| 100 mph (160.93 km/h) | 136.63 mph (219.88 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1460 | 1696 | 1826 | 1907 | 1994 | 2056 | 2125 | 2205 | 2317 | 2429 | 2553 | 2653 | 2833 | 3031 | 3187 | 3286 | 3342 | 3547 | 3833 | 4454 |
Better Fuel Economy Factory Ratios Increased Power
