Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 335/30-18 | 315/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.91 (658.2) | 27.92 (709.2) | 2.01 (51) 7.7% |
| Width inches (mm) | 13.19 (335) | 12.4 (315) | -0.79 (-20) -6% |
| Circum. inches (mm) | 81.41 (2067.8) | 87.72 (2228.02) | 6.31 (160.22) 7.7% |
| Sidewall Height inches (mm) | 3.96 (100.5) | 4.96 (126) | 1 (25.5) 25.4% |
| Revolutions per mile (km) | 778.29 (483.61) | 722.32 (448.83) | -55.97 (-34.78) -7.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.55 mph (34.68 km/h) |
| 25 mph (40.23 km/h) | 26.94 mph (43.35 km/h) |
| 30 mph (48.28 km/h) | 32.32 mph (52.02 km/h) |
| 35 mph (56.33 km/h) | 37.71 mph (60.69 km/h) |
| 40 mph (64.37 km/h) | 43.1 mph (69.36 km/h) |
| 45 mph (72.42 km/h) | 48.49 mph (78.03 km/h) |
| 50 mph (80.47 km/h) | 53.87 mph (86.7 km/h) |
| 55 mph (88.51 km/h) | 59.26 mph (95.37 km/h) |
| 60 mph (96.56 km/h) | 64.65 mph (104.04 km/h) |
| 65 mph (104.61 km/h) | 70.04 mph (112.71 km/h) |
| 70 mph (112.65 km/h) | 75.42 mph (121.38 km/h) |
| 75 mph (120.7 km/h) | 80.81 mph (130.05 km/h) |
| 80 mph (128.75 km/h) | 86.2 mph (138.72 km/h) |
| 85 mph (136.79 km/h) | 91.59 mph (147.39 km/h) |
| 90 mph (144.84 km/h) | 96.97 mph (156.06 km/h) |
| 95 mph (152.89 km/h) | 102.36 mph (164.73 km/h) |
| 100 mph (160.93 km/h) | 107.75 mph (173.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1838 | 2135 | 2300 | 2401 | 2511 | 2589 | 2675 | 2777 | 2918 | 3058 | 3215 | 3340 | 3567 | 3817 | 4013 | 4138 | 4208 | 4466 | 4826 | 5608 |
Better Fuel Economy Factory Ratios Increased Power
