Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 325/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 28.96 (735.5) | 0.81 (20.5) 2.9% |
| Width inches (mm) | 13.58 (345) | 12.8 (325) | -0.79 (-20) -5.8% |
| Circum. inches (mm) | 88.43 (2246.24) | 90.97 (2310.64) | 2.54 (64.4) 2.9% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 4.48 (113.75) | 0.4 (10.25) 9.9% |
| Revolutions per mile (km) | 716.46 (445.19) | 696.49 (432.78) | -19.97 (-12.41) -2.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.57 mph (33.11 km/h) |
| 25 mph (40.23 km/h) | 25.72 mph (41.39 km/h) |
| 30 mph (48.28 km/h) | 30.86 mph (49.66 km/h) |
| 35 mph (56.33 km/h) | 36 mph (57.94 km/h) |
| 40 mph (64.37 km/h) | 41.15 mph (66.22 km/h) |
| 45 mph (72.42 km/h) | 46.29 mph (74.5 km/h) |
| 50 mph (80.47 km/h) | 51.43 mph (82.77 km/h) |
| 55 mph (88.51 km/h) | 56.58 mph (91.05 km/h) |
| 60 mph (96.56 km/h) | 61.72 mph (99.33 km/h) |
| 65 mph (104.61 km/h) | 66.86 mph (107.61 km/h) |
| 70 mph (112.65 km/h) | 72.01 mph (115.88 km/h) |
| 75 mph (120.7 km/h) | 77.15 mph (124.16 km/h) |
| 80 mph (128.75 km/h) | 82.29 mph (132.44 km/h) |
| 85 mph (136.79 km/h) | 87.44 mph (140.72 km/h) |
| 90 mph (144.84 km/h) | 92.58 mph (148.99 km/h) |
| 95 mph (152.89 km/h) | 97.72 mph (157.27 km/h) |
| 100 mph (160.93 km/h) | 102.87 mph (165.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1772 | 2059 | 2217 | 2315 | 2421 | 2497 | 2579 | 2678 | 2813 | 2949 | 3100 | 3221 | 3439 | 3681 | 3869 | 3990 | 4058 | 4307 | 4654 | 5408 |
Better Fuel Economy Factory Ratios Increased Power
