Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-15 | 185/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.65 (626) | 25.2 (640) | 0.55 (14) 2.2% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 77.43 (1966.64) | 79.16 (2010.62) | 1.73 (43.98) 2.2% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 5.1 (129.5) | 0.28 (7) 5.7% |
| Revolutions per mile (km) | 818.32 (508.48) | 800.42 (497.36) | -17.9 (-11.12) -2.2% |
185/70-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.45 mph (32.91 km/h) |
| 25 mph (40.23 km/h) | 25.56 mph (41.13 km/h) |
| 30 mph (48.28 km/h) | 30.67 mph (49.36 km/h) |
| 35 mph (56.33 km/h) | 35.78 mph (57.59 km/h) |
| 40 mph (64.37 km/h) | 40.89 mph (65.81 km/h) |
| 45 mph (72.42 km/h) | 46.01 mph (74.04 km/h) |
| 50 mph (80.47 km/h) | 51.12 mph (82.27 km/h) |
| 55 mph (88.51 km/h) | 56.23 mph (90.49 km/h) |
| 60 mph (96.56 km/h) | 61.34 mph (98.72 km/h) |
| 65 mph (104.61 km/h) | 66.45 mph (106.95 km/h) |
| 70 mph (112.65 km/h) | 71.57 mph (115.17 km/h) |
| 75 mph (120.7 km/h) | 76.68 mph (123.4 km/h) |
| 80 mph (128.75 km/h) | 81.79 mph (131.63 km/h) |
| 85 mph (136.79 km/h) | 86.9 mph (139.85 km/h) |
| 90 mph (144.84 km/h) | 92.01 mph (148.08 km/h) |
| 95 mph (152.89 km/h) | 97.12 mph (156.31 km/h) |
| 100 mph (160.93 km/h) | 102.24 mph (164.53 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
