Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/35-18 | 305/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.51 (698.7) | 28.81 (731.7) | 1.3 (33) 4.7% |
| Width inches (mm) | 13.58 (345) | 12.01 (305) | -1.57 (-40) -11.6% |
| Circum. inches (mm) | 86.42 (2195.03) | 90.5 (2298.7) | 4.08 (103.67) 4.7% |
| Sidewall Height inches (mm) | 4.75 (120.75) | 5.4 (137.25) | 0.65 (16.5) 13.7% |
| Revolutions per mile (km) | 733.18 (455.57) | 700.11 (435.03) | -33.07 (-20.55) -4.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.94 mph (33.71 km/h) |
| 25 mph (40.23 km/h) | 26.18 mph (42.13 km/h) |
| 30 mph (48.28 km/h) | 31.42 mph (50.56 km/h) |
| 35 mph (56.33 km/h) | 36.65 mph (58.99 km/h) |
| 40 mph (64.37 km/h) | 41.89 mph (67.41 km/h) |
| 45 mph (72.42 km/h) | 47.13 mph (75.84 km/h) |
| 50 mph (80.47 km/h) | 52.36 mph (84.27 km/h) |
| 55 mph (88.51 km/h) | 57.6 mph (92.69 km/h) |
| 60 mph (96.56 km/h) | 62.83 mph (101.12 km/h) |
| 65 mph (104.61 km/h) | 68.07 mph (109.55 km/h) |
| 70 mph (112.65 km/h) | 73.31 mph (117.98 km/h) |
| 75 mph (120.7 km/h) | 78.54 mph (126.4 km/h) |
| 80 mph (128.75 km/h) | 83.78 mph (134.83 km/h) |
| 85 mph (136.79 km/h) | 89.01 mph (143.26 km/h) |
| 90 mph (144.84 km/h) | 94.25 mph (151.68 km/h) |
| 95 mph (152.89 km/h) | 99.49 mph (160.11 km/h) |
| 100 mph (160.93 km/h) | 104.72 mph (168.54 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1782 | 2070 | 2229 | 2328 | 2434 | 2509 | 2593 | 2691 | 2828 | 2964 | 3116 | 3237 | 3457 | 3700 | 3889 | 4011 | 4079 | 4329 | 4678 | 5436 |
Better Fuel Economy Factory Ratios Increased Power
