Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/85-14 | 185/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.38 (670.1) | 25.2 (640) | -1.19 (-30.1) -4.5% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 82.88 (2105.18) | 79.16 (2010.62) | -3.72 (-94.56) -4.5% |
| Sidewall Height inches (mm) | 6.19 (157.25) | 5.1 (129.5) | -1.09 (-27.75) -17.6% |
| Revolutions per mile (km) | 764.47 (475.02) | 800.42 (497.36) | 35.95 (22.34) 4.7% |
185/70-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.1 mph (30.74 km/h) |
| 25 mph (40.23 km/h) | 23.88 mph (38.43 km/h) |
| 30 mph (48.28 km/h) | 28.65 mph (46.11 km/h) |
| 35 mph (56.33 km/h) | 33.43 mph (53.8 km/h) |
| 40 mph (64.37 km/h) | 38.2 mph (61.48 km/h) |
| 45 mph (72.42 km/h) | 42.98 mph (69.17 km/h) |
| 50 mph (80.47 km/h) | 47.75 mph (76.85 km/h) |
| 55 mph (88.51 km/h) | 52.53 mph (84.54 km/h) |
| 60 mph (96.56 km/h) | 57.3 mph (92.22 km/h) |
| 65 mph (104.61 km/h) | 62.08 mph (99.91 km/h) |
| 70 mph (112.65 km/h) | 66.86 mph (107.59 km/h) |
| 75 mph (120.7 km/h) | 71.63 mph (115.28 km/h) |
| 80 mph (128.75 km/h) | 76.41 mph (122.96 km/h) |
| 85 mph (136.79 km/h) | 81.18 mph (130.65 km/h) |
| 90 mph (144.84 km/h) | 85.96 mph (138.34 km/h) |
| 95 mph (152.89 km/h) | 90.73 mph (146.02 km/h) |
| 100 mph (160.93 km/h) | 95.51 mph (153.71 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
