Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-19 | 325/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.15 (689.6) | 27.68 (703) | 0.53 (13.4) 1.9% |
| Width inches (mm) | 13.58 (345) | 12.8 (325) | -0.79 (-20) -5.8% |
| Circum. inches (mm) | 85.29 (2166.44) | 86.95 (2208.54) | 1.66 (42.1) 1.9% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 3.84 (97.5) | -0.24 (-6) -5.8% |
| Revolutions per mile (km) | 742.85 (461.59) | 728.69 (452.79) | -14.16 (-8.8) -1.9% |
325/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.39 mph (32.81 km/h) |
| 25 mph (40.23 km/h) | 25.49 mph (41.02 km/h) |
| 30 mph (48.28 km/h) | 30.58 mph (49.22 km/h) |
| 35 mph (56.33 km/h) | 35.68 mph (57.42 km/h) |
| 40 mph (64.37 km/h) | 40.78 mph (65.62 km/h) |
| 45 mph (72.42 km/h) | 45.87 mph (73.83 km/h) |
| 50 mph (80.47 km/h) | 50.97 mph (82.03 km/h) |
| 55 mph (88.51 km/h) | 56.07 mph (90.23 km/h) |
| 60 mph (96.56 km/h) | 61.17 mph (98.44 km/h) |
| 65 mph (104.61 km/h) | 66.26 mph (106.64 km/h) |
| 70 mph (112.65 km/h) | 71.36 mph (114.84 km/h) |
| 75 mph (120.7 km/h) | 76.46 mph (123.05 km/h) |
| 80 mph (128.75 km/h) | 81.55 mph (131.25 km/h) |
| 85 mph (136.79 km/h) | 86.65 mph (139.45 km/h) |
| 90 mph (144.84 km/h) | 91.75 mph (147.66 km/h) |
| 95 mph (152.89 km/h) | 96.85 mph (155.86 km/h) |
| 100 mph (160.93 km/h) | 101.94 mph (164.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1854 | 2154 | 2320 | 2423 | 2533 | 2612 | 2699 | 2801 | 2943 | 3085 | 3243 | 3369 | 3598 | 3851 | 4048 | 4174 | 4245 | 4506 | 4869 | 5658 |
Better Fuel Economy Factory Ratios Increased Power
