Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/70-16 | 185/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.34 (567.4) | 22.28 (566) | -0.06 (-1.4) -0.2% |
| Width inches (mm) | 4.53 (115) | 7.28 (185) | 2.76 (70) 60.9% |
| Circum. inches (mm) | 70.18 (1782.54) | 70.01 (1778.14) | -0.17 (-4.4) -0.2% |
| Sidewall Height inches (mm) | 3.17 (80.5) | 3.64 (92.5) | 0.47 (12) 14.9% |
| Revolutions per mile (km) | 902.84 (561) | 905.07 (562.38) | 2.23 (1.39) 0.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.95 mph (32.11 km/h) |
| 25 mph (40.23 km/h) | 24.94 mph (40.13 km/h) |
| 30 mph (48.28 km/h) | 29.93 mph (48.16 km/h) |
| 35 mph (56.33 km/h) | 34.91 mph (56.19 km/h) |
| 40 mph (64.37 km/h) | 39.9 mph (64.22 km/h) |
| 45 mph (72.42 km/h) | 44.89 mph (72.24 km/h) |
| 50 mph (80.47 km/h) | 49.88 mph (80.27 km/h) |
| 55 mph (88.51 km/h) | 54.86 mph (88.3 km/h) |
| 60 mph (96.56 km/h) | 59.85 mph (96.32 km/h) |
| 65 mph (104.61 km/h) | 64.84 mph (104.35 km/h) |
| 70 mph (112.65 km/h) | 69.83 mph (112.38 km/h) |
| 75 mph (120.7 km/h) | 74.81 mph (120.4 km/h) |
| 80 mph (128.75 km/h) | 79.8 mph (128.43 km/h) |
| 85 mph (136.79 km/h) | 84.79 mph (136.46 km/h) |
| 90 mph (144.84 km/h) | 89.78 mph (144.48 km/h) |
| 95 mph (152.89 km/h) | 94.77 mph (152.51 km/h) |
| 100 mph (160.93 km/h) | 99.75 mph (160.54 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2303 | 2676 | 2881 | 3009 | 3146 | 3244 | 3352 | 3479 | 3656 | 3832 | 4028 | 4185 | 4469 | 4783 | 5028 | 5185 | 5273 | 5596 | 6047 | 7027 |
Better Fuel Economy Factory Ratios Increased Power
