Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/65-17 | 185/70-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.59 (802.3) | 23.2 (589.2) | -8.39 (-213.1) -26.6% |
| Width inches (mm) | 11.22 (285) | 7.28 (185) | -3.94 (-100) -35.1% |
| Circum. inches (mm) | 99.23 (2520.5) | 72.88 (1851.03) | -26.36 (-669.47) -26.6% |
| Sidewall Height inches (mm) | 7.29 (185.25) | 5.1 (129.5) | -2.19 (-55.75) -30.1% |
| Revolutions per mile (km) | 638.5 (396.75) | 869.43 (540.24) | 230.93 (143.49) 36.2% |
185/70-13 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 14.69 mph (23.64 km/h) |
| 25 mph (40.23 km/h) | 18.36 mph (29.55 km/h) |
| 30 mph (48.28 km/h) | 22.03 mph (35.46 km/h) |
| 35 mph (56.33 km/h) | 25.7 mph (41.37 km/h) |
| 40 mph (64.37 km/h) | 29.38 mph (47.28 km/h) |
| 45 mph (72.42 km/h) | 33.05 mph (53.18 km/h) |
| 50 mph (80.47 km/h) | 36.72 mph (59.09 km/h) |
| 55 mph (88.51 km/h) | 40.39 mph (65 km/h) |
| 60 mph (96.56 km/h) | 44.06 mph (70.91 km/h) |
| 65 mph (104.61 km/h) | 47.74 mph (76.82 km/h) |
| 70 mph (112.65 km/h) | 51.41 mph (82.73 km/h) |
| 75 mph (120.7 km/h) | 55.08 mph (88.64 km/h) |
| 80 mph (128.75 km/h) | 58.75 mph (94.55 km/h) |
| 85 mph (136.79 km/h) | 62.42 mph (100.46 km/h) |
| 90 mph (144.84 km/h) | 66.09 mph (106.37 km/h) |
| 95 mph (152.89 km/h) | 69.77 mph (112.28 km/h) |
| 100 mph (160.93 km/h) | 73.44 mph (118.19 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2213 | 2570 | 2768 | 2890 | 3022 | 3116 | 3220 | 3342 | 3512 | 3681 | 3870 | 4020 | 4293 | 4595 | 4830 | 4981 | 5065 | 5376 | 5809 | 6751 |
Better Fuel Economy Factory Ratios Increased Power
