Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-13 | 185/70-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.97 (532.7) | 23.2 (589.2) | 2.22 (56.5) 10.6% |
| Width inches (mm) | 8.86 (225) | 7.28 (185) | -1.57 (-40) -17.8% |
| Circum. inches (mm) | 65.89 (1673.53) | 72.88 (1851.03) | 6.99 (177.5) 10.6% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 5.1 (129.5) | 1.11 (28.25) 27.9% |
| Revolutions per mile (km) | 961.65 (597.54) | 869.43 (540.24) | -92.22 (-57.3) -9.6% |
185/70-13 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.12 mph (35.6 km/h) |
| 25 mph (40.23 km/h) | 27.65 mph (44.5 km/h) |
| 30 mph (48.28 km/h) | 33.18 mph (53.4 km/h) |
| 35 mph (56.33 km/h) | 38.71 mph (62.3 km/h) |
| 40 mph (64.37 km/h) | 44.24 mph (71.2 km/h) |
| 45 mph (72.42 km/h) | 49.77 mph (80.1 km/h) |
| 50 mph (80.47 km/h) | 55.3 mph (89 km/h) |
| 55 mph (88.51 km/h) | 60.83 mph (97.9 km/h) |
| 60 mph (96.56 km/h) | 66.36 mph (106.8 km/h) |
| 65 mph (104.61 km/h) | 71.89 mph (115.7 km/h) |
| 70 mph (112.65 km/h) | 77.42 mph (124.6 km/h) |
| 75 mph (120.7 km/h) | 82.95 mph (133.5 km/h) |
| 80 mph (128.75 km/h) | 88.49 mph (142.4 km/h) |
| 85 mph (136.79 km/h) | 94.02 mph (151.3 km/h) |
| 90 mph (144.84 km/h) | 99.55 mph (160.2 km/h) |
| 95 mph (152.89 km/h) | 105.08 mph (169.1 km/h) |
| 100 mph (160.93 km/h) | 110.61 mph (178 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
