Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/40-18 | 335/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.24 (717.2) | 27.55 (699.8) | -0.69 (-17.4) -2.4% |
| Width inches (mm) | 12.8 (325) | 13.19 (335) | 0.39 (10) 3.1% |
| Circum. inches (mm) | 88.71 (2253.15) | 86.55 (2198.49) | -2.15 (-54.66) -2.4% |
| Sidewall Height inches (mm) | 5.12 (130) | 5.28 (134) | 0.16 (4) 3.1% |
| Revolutions per mile (km) | 714.26 (443.82) | 732.02 (454.86) | 17.76 (11.04) 2.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.51 mph (31.41 km/h) |
| 25 mph (40.23 km/h) | 24.39 mph (39.26 km/h) |
| 30 mph (48.28 km/h) | 29.27 mph (47.11 km/h) |
| 35 mph (56.33 km/h) | 34.15 mph (54.96 km/h) |
| 40 mph (64.37 km/h) | 39.03 mph (62.81 km/h) |
| 45 mph (72.42 km/h) | 43.91 mph (70.66 km/h) |
| 50 mph (80.47 km/h) | 48.79 mph (78.52 km/h) |
| 55 mph (88.51 km/h) | 53.67 mph (86.37 km/h) |
| 60 mph (96.56 km/h) | 58.54 mph (94.22 km/h) |
| 65 mph (104.61 km/h) | 63.42 mph (102.07 km/h) |
| 70 mph (112.65 km/h) | 68.3 mph (109.92 km/h) |
| 75 mph (120.7 km/h) | 73.18 mph (117.77 km/h) |
| 80 mph (128.75 km/h) | 78.06 mph (125.62 km/h) |
| 85 mph (136.79 km/h) | 82.94 mph (133.48 km/h) |
| 90 mph (144.84 km/h) | 87.82 mph (141.33 km/h) |
| 95 mph (152.89 km/h) | 92.7 mph (149.18 km/h) |
| 100 mph (160.93 km/h) | 97.57 mph (157.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1863 | 2164 | 2331 | 2434 | 2545 | 2624 | 2711 | 2814 | 2957 | 3099 | 3258 | 3385 | 3615 | 3868 | 4067 | 4193 | 4265 | 4526 | 4891 | 5684 |
Better Fuel Economy Factory Ratios Increased Power
