Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 405/30-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 39.57 (1005) | 2.13 (54) 5.7% |
| Width inches (mm) | 12.4 (315) | 15.94 (405) | 3.54 (90) 28.6% |
| Circum. inches (mm) | 117.62 (2987.65) | 124.3 (3157.3) | 6.68 (169.65) 5.7% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 4.78 (121.5) | 1.06 (27) 28.6% |
| Revolutions per mile (km) | 538.66 (334.71) | 509.72 (316.73) | -28.94 (-17.98) -5.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.14 mph (34.01 km/h) |
| 25 mph (40.23 km/h) | 26.42 mph (42.52 km/h) |
| 30 mph (48.28 km/h) | 31.7 mph (51.02 km/h) |
| 35 mph (56.33 km/h) | 36.99 mph (59.53 km/h) |
| 40 mph (64.37 km/h) | 42.27 mph (68.03 km/h) |
| 45 mph (72.42 km/h) | 47.56 mph (76.53 km/h) |
| 50 mph (80.47 km/h) | 52.84 mph (85.04 km/h) |
| 55 mph (88.51 km/h) | 58.12 mph (93.54 km/h) |
| 60 mph (96.56 km/h) | 63.41 mph (102.04 km/h) |
| 65 mph (104.61 km/h) | 68.69 mph (110.55 km/h) |
| 70 mph (112.65 km/h) | 73.97 mph (119.05 km/h) |
| 75 mph (120.7 km/h) | 79.26 mph (127.55 km/h) |
| 80 mph (128.75 km/h) | 84.54 mph (136.06 km/h) |
| 85 mph (136.79 km/h) | 89.83 mph (144.56 km/h) |
| 90 mph (144.84 km/h) | 95.11 mph (153.07 km/h) |
| 95 mph (152.89 km/h) | 100.39 mph (161.57 km/h) |
| 100 mph (160.93 km/h) | 105.68 mph (170.07 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1297 | 1507 | 1623 | 1695 | 1772 | 1827 | 1888 | 1960 | 2059 | 2158 | 2269 | 2357 | 2517 | 2694 | 2832 | 2920 | 2970 | 3152 | 3406 | 3958 |
Better Fuel Economy Factory Ratios Increased Power
