Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 255/30-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 36.02 (915) | -1.42 (-36) -3.8% |
| Width inches (mm) | 12.4 (315) | 10.04 (255) | -2.36 (-60) -19% |
| Circum. inches (mm) | 117.62 (2987.65) | 113.17 (2874.56) | -4.45 (-113.1) -3.8% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 3.01 (76.5) | -0.71 (-18) -19% |
| Revolutions per mile (km) | 538.66 (334.71) | 559.86 (347.88) | 21.19 (13.17) 3.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.24 mph (30.97 km/h) |
| 25 mph (40.23 km/h) | 24.05 mph (38.71 km/h) |
| 30 mph (48.28 km/h) | 28.86 mph (46.45 km/h) |
| 35 mph (56.33 km/h) | 33.68 mph (54.19 km/h) |
| 40 mph (64.37 km/h) | 38.49 mph (61.94 km/h) |
| 45 mph (72.42 km/h) | 43.3 mph (69.68 km/h) |
| 50 mph (80.47 km/h) | 48.11 mph (77.42 km/h) |
| 55 mph (88.51 km/h) | 52.92 mph (85.16 km/h) |
| 60 mph (96.56 km/h) | 57.73 mph (92.91 km/h) |
| 65 mph (104.61 km/h) | 62.54 mph (100.65 km/h) |
| 70 mph (112.65 km/h) | 67.35 mph (108.39 km/h) |
| 75 mph (120.7 km/h) | 72.16 mph (116.13 km/h) |
| 80 mph (128.75 km/h) | 76.97 mph (123.87 km/h) |
| 85 mph (136.79 km/h) | 81.78 mph (131.62 km/h) |
| 90 mph (144.84 km/h) | 86.59 mph (139.36 km/h) |
| 95 mph (152.89 km/h) | 91.4 mph (147.1 km/h) |
| 100 mph (160.93 km/h) | 96.21 mph (154.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1425 | 1655 | 1782 | 1861 | 1946 | 2007 | 2073 | 2152 | 2261 | 2371 | 2492 | 2589 | 2765 | 2959 | 3110 | 3207 | 3262 | 3462 | 3741 | 4347 |
Better Fuel Economy Factory Ratios Increased Power
