Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 255/25-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 35.02 (889.5) | -2.42 (-61.5) -6.5% |
| Width inches (mm) | 12.4 (315) | 10.04 (255) | -2.36 (-60) -19% |
| Circum. inches (mm) | 117.62 (2987.65) | 110.02 (2794.45) | -7.61 (-193.21) -6.5% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 2.51 (63.75) | -1.21 (-30.75) -32.5% |
| Revolutions per mile (km) | 538.66 (334.71) | 575.91 (357.85) | 37.24 (23.14) 6.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.71 mph (30.11 km/h) |
| 25 mph (40.23 km/h) | 23.38 mph (37.63 km/h) |
| 30 mph (48.28 km/h) | 28.06 mph (45.16 km/h) |
| 35 mph (56.33 km/h) | 32.74 mph (52.68 km/h) |
| 40 mph (64.37 km/h) | 37.41 mph (60.21 km/h) |
| 45 mph (72.42 km/h) | 42.09 mph (67.74 km/h) |
| 50 mph (80.47 km/h) | 46.77 mph (75.26 km/h) |
| 55 mph (88.51 km/h) | 51.44 mph (82.79 km/h) |
| 60 mph (96.56 km/h) | 56.12 mph (90.32 km/h) |
| 65 mph (104.61 km/h) | 60.8 mph (97.84 km/h) |
| 70 mph (112.65 km/h) | 65.47 mph (105.37 km/h) |
| 75 mph (120.7 km/h) | 70.15 mph (112.9 km/h) |
| 80 mph (128.75 km/h) | 74.83 mph (120.42 km/h) |
| 85 mph (136.79 km/h) | 79.5 mph (127.95 km/h) |
| 90 mph (144.84 km/h) | 84.18 mph (135.47 km/h) |
| 95 mph (152.89 km/h) | 88.86 mph (143 km/h) |
| 100 mph (160.93 km/h) | 93.53 mph (150.53 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1466 | 1703 | 1834 | 1915 | 2002 | 2064 | 2133 | 2214 | 2326 | 2438 | 2563 | 2663 | 2844 | 3043 | 3199 | 3299 | 3355 | 3561 | 3848 | 4472 |
Better Fuel Economy Factory Ratios Increased Power
