Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/40-18 | 325/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.24 (717.2) | 26.96 (684.7) | -1.28 (-32.5) -4.5% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 88.71 (2253.15) | 84.69 (2151.05) | -4.02 (-102.1) -4.5% |
| Sidewall Height inches (mm) | 5.12 (130) | 4.48 (113.75) | -0.64 (-16.25) -12.5% |
| Revolutions per mile (km) | 714.26 (443.82) | 748.17 (464.89) | 33.9 (21.07) 4.7% |
325/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.09 mph (30.73 km/h) |
| 25 mph (40.23 km/h) | 23.87 mph (38.41 km/h) |
| 30 mph (48.28 km/h) | 28.64 mph (46.09 km/h) |
| 35 mph (56.33 km/h) | 33.41 mph (53.77 km/h) |
| 40 mph (64.37 km/h) | 38.19 mph (61.46 km/h) |
| 45 mph (72.42 km/h) | 42.96 mph (69.14 km/h) |
| 50 mph (80.47 km/h) | 47.73 mph (76.82 km/h) |
| 55 mph (88.51 km/h) | 52.51 mph (84.5 km/h) |
| 60 mph (96.56 km/h) | 57.28 mph (92.19 km/h) |
| 65 mph (104.61 km/h) | 62.05 mph (99.87 km/h) |
| 70 mph (112.65 km/h) | 66.83 mph (107.55 km/h) |
| 75 mph (120.7 km/h) | 71.6 mph (115.23 km/h) |
| 80 mph (128.75 km/h) | 76.37 mph (122.91 km/h) |
| 85 mph (136.79 km/h) | 81.15 mph (130.6 km/h) |
| 90 mph (144.84 km/h) | 85.92 mph (138.28 km/h) |
| 95 mph (152.89 km/h) | 90.7 mph (145.96 km/h) |
| 100 mph (160.93 km/h) | 95.47 mph (153.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1904 | 2212 | 2382 | 2487 | 2601 | 2682 | 2771 | 2876 | 3022 | 3168 | 3330 | 3460 | 3694 | 3954 | 4156 | 4286 | 4359 | 4626 | 4999 | 5809 |
Better Fuel Economy Factory Ratios Increased Power
