Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/90-15 | 420/69-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.57 (624) | 37.82 (960.6) | 13.25 (336.6) 53.9% |
| Width inches (mm) | 5.31 (135) | 16.54 (420) | 11.22 (285) 211.1% |
| Circum. inches (mm) | 77.18 (1960.35) | 118.81 (3017.81) | 41.63 (1057.46) 53.9% |
| Sidewall Height inches (mm) | 4.78 (121.5) | 11.41 (289.8) | 6.63 (168.3) 138.5% |
| Revolutions per mile (km) | 820.95 (510.11) | 533.28 (331.37) | -287.66 (-178.75) -35% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 30.79 mph (49.55 km/h) |
| 25 mph (40.23 km/h) | 38.49 mph (61.94 km/h) |
| 30 mph (48.28 km/h) | 46.18 mph (74.32 km/h) |
| 35 mph (56.33 km/h) | 53.88 mph (86.71 km/h) |
| 40 mph (64.37 km/h) | 61.58 mph (99.1 km/h) |
| 45 mph (72.42 km/h) | 69.27 mph (111.49 km/h) |
| 50 mph (80.47 km/h) | 76.97 mph (123.87 km/h) |
| 55 mph (88.51 km/h) | 84.67 mph (136.26 km/h) |
| 60 mph (96.56 km/h) | 92.37 mph (148.65 km/h) |
| 65 mph (104.61 km/h) | 100.06 mph (161.04 km/h) |
| 70 mph (112.65 km/h) | 107.76 mph (173.42 km/h) |
| 75 mph (120.7 km/h) | 115.46 mph (185.81 km/h) |
| 80 mph (128.75 km/h) | 123.15 mph (198.2 km/h) |
| 85 mph (136.79 km/h) | 130.85 mph (210.58 km/h) |
| 90 mph (144.84 km/h) | 138.55 mph (222.97 km/h) |
| 95 mph (152.89 km/h) | 146.25 mph (235.36 km/h) |
| 100 mph (160.93 km/h) | 153.94 mph (247.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1357 | 1577 | 1698 | 1773 | 1854 | 1911 | 1975 | 2050 | 2154 | 2258 | 2373 | 2466 | 2633 | 2818 | 2963 | 3055 | 3107 | 3297 | 3563 | 4141 |
Better Fuel Economy Factory Ratios Increased Power
