Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/45-18 | 305/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.81 (731.7) | 30.01 (762.2) | 1.2 (30.5) 4.2% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 90.5 (2298.7) | 94.27 (2394.52) | 3.77 (95.82) 4.2% |
| Sidewall Height inches (mm) | 5.4 (137.25) | 6 (152.5) | 0.6 (15.25) 11.1% |
| Revolutions per mile (km) | 700.11 (435.03) | 672.09 (417.62) | -28.02 (-17.41) -4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.83 mph (33.53 km/h) |
| 25 mph (40.23 km/h) | 26.04 mph (41.91 km/h) |
| 30 mph (48.28 km/h) | 31.25 mph (50.29 km/h) |
| 35 mph (56.33 km/h) | 36.46 mph (58.68 km/h) |
| 40 mph (64.37 km/h) | 41.67 mph (67.06 km/h) |
| 45 mph (72.42 km/h) | 46.88 mph (75.44 km/h) |
| 50 mph (80.47 km/h) | 52.08 mph (83.82 km/h) |
| 55 mph (88.51 km/h) | 57.29 mph (92.2 km/h) |
| 60 mph (96.56 km/h) | 62.5 mph (100.59 km/h) |
| 65 mph (104.61 km/h) | 67.71 mph (108.97 km/h) |
| 70 mph (112.65 km/h) | 72.92 mph (117.35 km/h) |
| 75 mph (120.7 km/h) | 78.13 mph (125.73 km/h) |
| 80 mph (128.75 km/h) | 83.33 mph (134.11 km/h) |
| 85 mph (136.79 km/h) | 88.54 mph (142.5 km/h) |
| 90 mph (144.84 km/h) | 93.75 mph (150.88 km/h) |
| 95 mph (152.89 km/h) | 98.96 mph (159.26 km/h) |
| 100 mph (160.93 km/h) | 104.17 mph (167.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1710 | 1987 | 2140 | 2234 | 2336 | 2409 | 2489 | 2584 | 2715 | 2846 | 2991 | 3108 | 3319 | 3552 | 3734 | 3850 | 3916 | 4156 | 4491 | 5218 |
Better Fuel Economy Factory Ratios Increased Power
