Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 305/35-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 38.41 (975.5) | 0.96 (24.5) 2.6% |
| Width inches (mm) | 12.4 (315) | 12.01 (305) | -0.39 (-10) -3.2% |
| Circum. inches (mm) | 117.62 (2987.65) | 120.65 (3064.62) | 3.03 (76.97) 2.6% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 4.2 (106.75) | 0.48 (12.25) 13% |
| Revolutions per mile (km) | 538.66 (334.71) | 525.14 (326.3) | -13.53 (-8.41) -2.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.52 mph (33.02 km/h) |
| 25 mph (40.23 km/h) | 25.64 mph (41.27 km/h) |
| 30 mph (48.28 km/h) | 30.77 mph (49.52 km/h) |
| 35 mph (56.33 km/h) | 35.9 mph (57.78 km/h) |
| 40 mph (64.37 km/h) | 41.03 mph (66.03 km/h) |
| 45 mph (72.42 km/h) | 46.16 mph (74.29 km/h) |
| 50 mph (80.47 km/h) | 51.29 mph (82.54 km/h) |
| 55 mph (88.51 km/h) | 56.42 mph (90.79 km/h) |
| 60 mph (96.56 km/h) | 61.55 mph (99.05 km/h) |
| 65 mph (104.61 km/h) | 66.67 mph (107.3 km/h) |
| 70 mph (112.65 km/h) | 71.8 mph (115.56 km/h) |
| 75 mph (120.7 km/h) | 76.93 mph (123.81 km/h) |
| 80 mph (128.75 km/h) | 82.06 mph (132.06 km/h) |
| 85 mph (136.79 km/h) | 87.19 mph (140.32 km/h) |
| 90 mph (144.84 km/h) | 92.32 mph (148.57 km/h) |
| 95 mph (152.89 km/h) | 97.45 mph (156.83 km/h) |
| 100 mph (160.93 km/h) | 102.58 mph (165.08 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1336 | 1552 | 1672 | 1746 | 1825 | 1882 | 1945 | 2019 | 2121 | 2223 | 2337 | 2428 | 2593 | 2775 | 2917 | 3008 | 3059 | 3247 | 3509 | 4077 |
Better Fuel Economy Factory Ratios Increased Power
