Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-18 | 255/30-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.97 (659.7) | 24.02 (610.2) | -1.95 (-49.5) -7.5% |
| Width inches (mm) | 8.86 (225) | 10.04 (255) | 1.18 (30) 13.3% |
| Circum. inches (mm) | 81.59 (2072.51) | 75.47 (1917) | -6.12 (-155.51) -7.5% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 3.01 (76.5) | -0.97 (-24.75) -24.4% |
| Revolutions per mile (km) | 776.52 (482.51) | 839.51 (521.65) | 62.99 (39.14) 8.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.5 mph (29.77 km/h) |
| 25 mph (40.23 km/h) | 23.12 mph (37.21 km/h) |
| 30 mph (48.28 km/h) | 27.75 mph (44.66 km/h) |
| 35 mph (56.33 km/h) | 32.37 mph (52.1 km/h) |
| 40 mph (64.37 km/h) | 37 mph (59.54 km/h) |
| 45 mph (72.42 km/h) | 41.62 mph (66.99 km/h) |
| 50 mph (80.47 km/h) | 46.25 mph (74.43 km/h) |
| 55 mph (88.51 km/h) | 50.87 mph (81.87 km/h) |
| 60 mph (96.56 km/h) | 55.5 mph (89.32 km/h) |
| 65 mph (104.61 km/h) | 60.12 mph (96.76 km/h) |
| 70 mph (112.65 km/h) | 64.75 mph (104.2 km/h) |
| 75 mph (120.7 km/h) | 69.37 mph (111.64 km/h) |
| 80 mph (128.75 km/h) | 74 mph (119.09 km/h) |
| 85 mph (136.79 km/h) | 78.62 mph (126.53 km/h) |
| 90 mph (144.84 km/h) | 83.25 mph (133.97 km/h) |
| 95 mph (152.89 km/h) | 87.87 mph (141.42 km/h) |
| 100 mph (160.93 km/h) | 92.5 mph (148.86 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2136 | 2482 | 2673 | 2791 | 2918 | 3009 | 3109 | 3227 | 3391 | 3555 | 3736 | 3882 | 4146 | 4436 | 4664 | 4809 | 4891 | 5191 | 5609 | 6518 |
Better Fuel Economy Factory Ratios Increased Power
