Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/35-18 | 305/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.41 (670.7) | 27.61 (701.2) | 1.2 (30.5) 4.5% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 82.96 (2107.07) | 86.73 (2202.88) | 3.77 (95.82) 4.5% |
| Sidewall Height inches (mm) | 4.2 (106.75) | 4.8 (122) | 0.6 (15.25) 14.3% |
| Revolutions per mile (km) | 763.78 (474.59) | 730.56 (453.95) | -33.22 (-20.64) -4.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.91 mph (33.65 km/h) |
| 25 mph (40.23 km/h) | 26.14 mph (42.06 km/h) |
| 30 mph (48.28 km/h) | 31.36 mph (50.48 km/h) |
| 35 mph (56.33 km/h) | 36.59 mph (58.89 km/h) |
| 40 mph (64.37 km/h) | 41.82 mph (67.3 km/h) |
| 45 mph (72.42 km/h) | 47.05 mph (75.71 km/h) |
| 50 mph (80.47 km/h) | 52.27 mph (84.13 km/h) |
| 55 mph (88.51 km/h) | 57.5 mph (92.54 km/h) |
| 60 mph (96.56 km/h) | 62.73 mph (100.95 km/h) |
| 65 mph (104.61 km/h) | 67.96 mph (109.36 km/h) |
| 70 mph (112.65 km/h) | 73.18 mph (117.78 km/h) |
| 75 mph (120.7 km/h) | 78.41 mph (126.19 km/h) |
| 80 mph (128.75 km/h) | 83.64 mph (134.6 km/h) |
| 85 mph (136.79 km/h) | 88.87 mph (143.02 km/h) |
| 90 mph (144.84 km/h) | 94.09 mph (151.43 km/h) |
| 95 mph (152.89 km/h) | 99.32 mph (159.84 km/h) |
| 100 mph (160.93 km/h) | 104.55 mph (168.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1859 | 2160 | 2326 | 2429 | 2540 | 2619 | 2706 | 2808 | 2951 | 3093 | 3252 | 3378 | 3608 | 3861 | 4058 | 4185 | 4256 | 4517 | 4881 | 5672 |
Better Fuel Economy Factory Ratios Increased Power
