Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/40-18 | 265/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.24 (717.2) | 27.39 (695.7) | -0.85 (-21.5) -3% |
| Width inches (mm) | 12.8 (325) | 10.43 (265) | -2.36 (-60) -18.5% |
| Circum. inches (mm) | 88.71 (2253.15) | 86.05 (2185.61) | -2.66 (-67.54) -3% |
| Sidewall Height inches (mm) | 5.12 (130) | 4.69 (119.25) | -0.42 (-10.75) -8.3% |
| Revolutions per mile (km) | 714.26 (443.82) | 736.34 (457.54) | 22.07 (13.72) 3.1% |
265/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.4 mph (31.22 km/h) |
| 25 mph (40.23 km/h) | 24.25 mph (39.03 km/h) |
| 30 mph (48.28 km/h) | 29.1 mph (46.83 km/h) |
| 35 mph (56.33 km/h) | 33.95 mph (54.64 km/h) |
| 40 mph (64.37 km/h) | 38.8 mph (62.44 km/h) |
| 45 mph (72.42 km/h) | 43.65 mph (70.25 km/h) |
| 50 mph (80.47 km/h) | 48.5 mph (78.06 km/h) |
| 55 mph (88.51 km/h) | 53.35 mph (85.86 km/h) |
| 60 mph (96.56 km/h) | 58.2 mph (93.67 km/h) |
| 65 mph (104.61 km/h) | 63.05 mph (101.47 km/h) |
| 70 mph (112.65 km/h) | 67.9 mph (109.28 km/h) |
| 75 mph (120.7 km/h) | 72.75 mph (117.08 km/h) |
| 80 mph (128.75 km/h) | 77.6 mph (124.89 km/h) |
| 85 mph (136.79 km/h) | 82.45 mph (132.69 km/h) |
| 90 mph (144.84 km/h) | 87.3 mph (140.5 km/h) |
| 95 mph (152.89 km/h) | 92.15 mph (148.3 km/h) |
| 100 mph (160.93 km/h) | 97 mph (156.11 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1874 | 2177 | 2344 | 2448 | 2560 | 2639 | 2727 | 2831 | 2974 | 3118 | 3277 | 3405 | 3636 | 3891 | 4091 | 4218 | 4290 | 4553 | 4920 | 5717 |
Better Fuel Economy Factory Ratios Increased Power
