Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-13 | 185/45-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.97 (532.7) | 19.56 (496.7) | -1.42 (-36) -6.8% |
| Width inches (mm) | 8.86 (225) | 7.28 (185) | -1.57 (-40) -17.8% |
| Circum. inches (mm) | 65.89 (1673.53) | 61.43 (1560.43) | -4.45 (-113.1) -6.8% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 3.28 (83.25) | -0.71 (-18) -17.8% |
| Revolutions per mile (km) | 961.65 (597.54) | 1031.35 (640.85) | 69.7 (43.31) 7.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.65 mph (30.01 km/h) |
| 25 mph (40.23 km/h) | 23.31 mph (37.51 km/h) |
| 30 mph (48.28 km/h) | 27.97 mph (45.02 km/h) |
| 35 mph (56.33 km/h) | 32.63 mph (52.52 km/h) |
| 40 mph (64.37 km/h) | 37.3 mph (60.02 km/h) |
| 45 mph (72.42 km/h) | 41.96 mph (67.53 km/h) |
| 50 mph (80.47 km/h) | 46.62 mph (75.03 km/h) |
| 55 mph (88.51 km/h) | 51.28 mph (82.53 km/h) |
| 60 mph (96.56 km/h) | 55.95 mph (90.04 km/h) |
| 65 mph (104.61 km/h) | 60.61 mph (97.54 km/h) |
| 70 mph (112.65 km/h) | 65.27 mph (105.04 km/h) |
| 75 mph (120.7 km/h) | 69.93 mph (112.54 km/h) |
| 80 mph (128.75 km/h) | 74.59 mph (120.05 km/h) |
| 85 mph (136.79 km/h) | 79.26 mph (127.55 km/h) |
| 90 mph (144.84 km/h) | 83.92 mph (135.05 km/h) |
| 95 mph (152.89 km/h) | 88.58 mph (142.56 km/h) |
| 100 mph (160.93 km/h) | 93.24 mph (150.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
