Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-15 | 185/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.54 (598) | 25.2 (640) | 1.65 (42) 7% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 73.96 (1878.67) | 79.16 (2010.62) | 5.19 (131.95) 7% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 5.1 (129.5) | 0.83 (21) 19.4% |
| Revolutions per mile (km) | 856.64 (532.29) | 800.42 (497.36) | -56.22 (-34.93) -6.6% |
185/70-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.4 mph (34.45 km/h) |
| 25 mph (40.23 km/h) | 26.76 mph (43.06 km/h) |
| 30 mph (48.28 km/h) | 32.11 mph (51.67 km/h) |
| 35 mph (56.33 km/h) | 37.46 mph (60.28 km/h) |
| 40 mph (64.37 km/h) | 42.81 mph (68.9 km/h) |
| 45 mph (72.42 km/h) | 48.16 mph (77.51 km/h) |
| 50 mph (80.47 km/h) | 53.51 mph (86.12 km/h) |
| 55 mph (88.51 km/h) | 58.86 mph (94.73 km/h) |
| 60 mph (96.56 km/h) | 64.21 mph (103.34 km/h) |
| 65 mph (104.61 km/h) | 69.57 mph (111.95 km/h) |
| 70 mph (112.65 km/h) | 74.92 mph (120.57 km/h) |
| 75 mph (120.7 km/h) | 80.27 mph (129.18 km/h) |
| 80 mph (128.75 km/h) | 85.62 mph (137.79 km/h) |
| 85 mph (136.79 km/h) | 90.97 mph (146.4 km/h) |
| 90 mph (144.84 km/h) | 96.32 mph (155.01 km/h) |
| 95 mph (152.89 km/h) | 101.67 mph (163.63 km/h) |
| 100 mph (160.93 km/h) | 107.02 mph (172.24 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
