Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 370/40-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 35.65 (905.6) | -1.79 (-45.4) -4.8% |
| Width inches (mm) | 12.4 (315) | 14.57 (370) | 2.17 (55) 17.5% |
| Circum. inches (mm) | 117.62 (2987.65) | 112.01 (2845.03) | -5.62 (-142.63) -4.8% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 5.83 (148) | 2.11 (53.5) 56.6% |
| Revolutions per mile (km) | 538.66 (334.71) | 565.67 (351.49) | 27 (16.78) 5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.05 mph (30.65 km/h) |
| 25 mph (40.23 km/h) | 23.81 mph (38.31 km/h) |
| 30 mph (48.28 km/h) | 28.57 mph (45.98 km/h) |
| 35 mph (56.33 km/h) | 33.33 mph (53.64 km/h) |
| 40 mph (64.37 km/h) | 38.09 mph (61.3 km/h) |
| 45 mph (72.42 km/h) | 42.85 mph (68.96 km/h) |
| 50 mph (80.47 km/h) | 47.61 mph (76.63 km/h) |
| 55 mph (88.51 km/h) | 52.37 mph (84.29 km/h) |
| 60 mph (96.56 km/h) | 57.14 mph (91.95 km/h) |
| 65 mph (104.61 km/h) | 61.9 mph (99.61 km/h) |
| 70 mph (112.65 km/h) | 66.66 mph (107.28 km/h) |
| 75 mph (120.7 km/h) | 71.42 mph (114.94 km/h) |
| 80 mph (128.75 km/h) | 76.18 mph (122.6 km/h) |
| 85 mph (136.79 km/h) | 80.94 mph (130.26 km/h) |
| 90 mph (144.84 km/h) | 85.7 mph (137.93 km/h) |
| 95 mph (152.89 km/h) | 90.46 mph (145.59 km/h) |
| 100 mph (160.93 km/h) | 95.23 mph (153.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1440 | 1672 | 1801 | 1881 | 1966 | 2028 | 2095 | 2175 | 2285 | 2395 | 2518 | 2616 | 2793 | 2989 | 3142 | 3240 | 3296 | 3498 | 3780 | 4392 |
Better Fuel Economy Factory Ratios Increased Power
