Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/45-17 | 305/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.52 (724.3) | 26.61 (675.8) | -1.91 (-48.5) -6.7% |
| Width inches (mm) | 12.8 (325) | 12.01 (305) | -0.79 (-20) -6.2% |
| Circum. inches (mm) | 89.58 (2275.46) | 83.59 (2123.09) | -6 (-152.37) -6.7% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 4.8 (122) | -0.95 (-24.25) -16.6% |
| Revolutions per mile (km) | 707.26 (439.47) | 758.02 (471.01) | 50.76 (31.54) 7.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.66 mph (30.03 km/h) |
| 25 mph (40.23 km/h) | 23.33 mph (37.54 km/h) |
| 30 mph (48.28 km/h) | 27.99 mph (45.05 km/h) |
| 35 mph (56.33 km/h) | 32.66 mph (52.56 km/h) |
| 40 mph (64.37 km/h) | 37.32 mph (60.06 km/h) |
| 45 mph (72.42 km/h) | 41.99 mph (67.57 km/h) |
| 50 mph (80.47 km/h) | 46.65 mph (75.08 km/h) |
| 55 mph (88.51 km/h) | 51.32 mph (82.59 km/h) |
| 60 mph (96.56 km/h) | 55.98 mph (90.09 km/h) |
| 65 mph (104.61 km/h) | 60.65 mph (97.6 km/h) |
| 70 mph (112.65 km/h) | 65.31 mph (105.11 km/h) |
| 75 mph (120.7 km/h) | 69.98 mph (112.62 km/h) |
| 80 mph (128.75 km/h) | 74.64 mph (120.13 km/h) |
| 85 mph (136.79 km/h) | 79.31 mph (127.63 km/h) |
| 90 mph (144.84 km/h) | 83.97 mph (135.14 km/h) |
| 95 mph (152.89 km/h) | 88.64 mph (142.65 km/h) |
| 100 mph (160.93 km/h) | 93.3 mph (150.16 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1929 | 2241 | 2413 | 2520 | 2635 | 2717 | 2807 | 2914 | 3062 | 3210 | 3374 | 3505 | 3743 | 4006 | 4211 | 4342 | 4416 | 4687 | 5065 | 5886 |
Better Fuel Economy Factory Ratios Increased Power
