Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-20 | 330/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.2 (665.5) | 26.5 (673) | 0.3 (7.5) 1.1% |
| Width inches (mm) | 12.4 (315) | 12.99 (330) | 0.59 (15) 4.8% |
| Circum. inches (mm) | 82.31 (2090.73) | 83.24 (2114.29) | 0.93 (23.56) 1.1% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 3.25 (82.5) | 0.15 (3.75) 4.8% |
| Revolutions per mile (km) | 769.75 (478.3) | 761.17 (472.97) | -8.58 (-5.33) -1.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.23 mph (32.55 km/h) |
| 25 mph (40.23 km/h) | 25.28 mph (40.69 km/h) |
| 30 mph (48.28 km/h) | 30.34 mph (48.82 km/h) |
| 35 mph (56.33 km/h) | 35.39 mph (56.96 km/h) |
| 40 mph (64.37 km/h) | 40.45 mph (65.1 km/h) |
| 45 mph (72.42 km/h) | 45.51 mph (73.24 km/h) |
| 50 mph (80.47 km/h) | 50.56 mph (81.37 km/h) |
| 55 mph (88.51 km/h) | 55.62 mph (89.51 km/h) |
| 60 mph (96.56 km/h) | 60.68 mph (97.65 km/h) |
| 65 mph (104.61 km/h) | 65.73 mph (105.79 km/h) |
| 70 mph (112.65 km/h) | 70.79 mph (113.92 km/h) |
| 75 mph (120.7 km/h) | 75.85 mph (122.06 km/h) |
| 80 mph (128.75 km/h) | 80.9 mph (130.2 km/h) |
| 85 mph (136.79 km/h) | 85.96 mph (138.34 km/h) |
| 90 mph (144.84 km/h) | 91.01 mph (146.47 km/h) |
| 95 mph (152.89 km/h) | 96.07 mph (154.61 km/h) |
| 100 mph (160.93 km/h) | 101.13 mph (162.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1937 | 2250 | 2423 | 2531 | 2646 | 2728 | 2819 | 2926 | 3075 | 3223 | 3388 | 3520 | 3759 | 4022 | 4229 | 4360 | 4435 | 4707 | 5086 | 5910 |
Better Fuel Economy Factory Ratios Increased Power
