Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/75-15 | 185/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.33 (643.5) | 25.2 (640) | -0.14 (-3.5) -0.5% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 79.59 (2021.61) | 79.16 (2010.62) | -0.43 (-11) -0.5% |
| Sidewall Height inches (mm) | 5.17 (131.25) | 5.1 (129.5) | -0.07 (-1.75) -1.3% |
| Revolutions per mile (km) | 796.07 (494.65) | 800.42 (497.36) | 4.35 (2.71) 0.5% |
185/70-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.89 mph (32.01 km/h) |
| 25 mph (40.23 km/h) | 24.86 mph (40.01 km/h) |
| 30 mph (48.28 km/h) | 29.84 mph (48.02 km/h) |
| 35 mph (56.33 km/h) | 34.81 mph (56.02 km/h) |
| 40 mph (64.37 km/h) | 39.78 mph (64.02 km/h) |
| 45 mph (72.42 km/h) | 44.76 mph (72.03 km/h) |
| 50 mph (80.47 km/h) | 49.73 mph (80.03 km/h) |
| 55 mph (88.51 km/h) | 54.7 mph (88.03 km/h) |
| 60 mph (96.56 km/h) | 59.67 mph (96.04 km/h) |
| 65 mph (104.61 km/h) | 64.65 mph (104.04 km/h) |
| 70 mph (112.65 km/h) | 69.62 mph (112.04 km/h) |
| 75 mph (120.7 km/h) | 74.59 mph (120.04 km/h) |
| 80 mph (128.75 km/h) | 79.56 mph (128.05 km/h) |
| 85 mph (136.79 km/h) | 84.54 mph (136.05 km/h) |
| 90 mph (144.84 km/h) | 89.51 mph (144.05 km/h) |
| 95 mph (152.89 km/h) | 94.48 mph (152.06 km/h) |
| 100 mph (160.93 km/h) | 99.46 mph (160.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2037 | 2366 | 2548 | 2661 | 2782 | 2869 | 2964 | 3077 | 3233 | 3389 | 3562 | 3701 | 3952 | 4230 | 4447 | 4585 | 4663 | 4949 | 5348 | 6215 |
Better Fuel Economy Factory Ratios Increased Power
