Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/45-17 | 345/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.52 (724.3) | 27.87 (707.8) | -0.65 (-16.5) -2.3% |
| Width inches (mm) | 12.8 (325) | 13.58 (345) | 0.79 (20) 6.2% |
| Circum. inches (mm) | 89.58 (2275.46) | 87.54 (2223.62) | -2.04 (-51.84) -2.3% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 5.43 (138) | -0.32 (-8.25) -5.6% |
| Revolutions per mile (km) | 707.26 (439.47) | 723.75 (449.72) | 16.49 (10.24) 2.3% |
345/40-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.54 mph (31.45 km/h) |
| 25 mph (40.23 km/h) | 24.43 mph (39.32 km/h) |
| 30 mph (48.28 km/h) | 29.32 mph (47.18 km/h) |
| 35 mph (56.33 km/h) | 34.2 mph (55.04 km/h) |
| 40 mph (64.37 km/h) | 39.09 mph (62.91 km/h) |
| 45 mph (72.42 km/h) | 43.97 mph (70.77 km/h) |
| 50 mph (80.47 km/h) | 48.86 mph (78.63 km/h) |
| 55 mph (88.51 km/h) | 53.75 mph (86.5 km/h) |
| 60 mph (96.56 km/h) | 58.63 mph (94.36 km/h) |
| 65 mph (104.61 km/h) | 63.52 mph (102.22 km/h) |
| 70 mph (112.65 km/h) | 68.41 mph (110.09 km/h) |
| 75 mph (120.7 km/h) | 73.29 mph (117.95 km/h) |
| 80 mph (128.75 km/h) | 78.18 mph (125.81 km/h) |
| 85 mph (136.79 km/h) | 83.06 mph (133.68 km/h) |
| 90 mph (144.84 km/h) | 87.95 mph (141.54 km/h) |
| 95 mph (152.89 km/h) | 92.84 mph (149.41 km/h) |
| 100 mph (160.93 km/h) | 97.72 mph (157.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1842 | 2140 | 2304 | 2406 | 2516 | 2594 | 2680 | 2782 | 2923 | 3064 | 3221 | 3347 | 3574 | 3825 | 4021 | 4146 | 4217 | 4475 | 4836 | 5619 |
Better Fuel Economy Factory Ratios Increased Power
