Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/35-19 | 325/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.51 (724.1) | 27.68 (703) | -0.83 (-21.1) -2.9% |
| Width inches (mm) | 13.58 (345) | 12.8 (325) | -0.79 (-20) -5.8% |
| Circum. inches (mm) | 89.56 (2274.83) | 86.95 (2208.54) | -2.61 (-66.29) -2.9% |
| Sidewall Height inches (mm) | 4.75 (120.75) | 3.84 (97.5) | -0.92 (-23.25) -19.3% |
| Revolutions per mile (km) | 707.46 (439.59) | 728.69 (452.79) | 21.23 (13.19) 3% |
325/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.42 mph (31.25 km/h) |
| 25 mph (40.23 km/h) | 24.27 mph (39.06 km/h) |
| 30 mph (48.28 km/h) | 29.13 mph (46.87 km/h) |
| 35 mph (56.33 km/h) | 33.98 mph (54.69 km/h) |
| 40 mph (64.37 km/h) | 38.83 mph (62.5 km/h) |
| 45 mph (72.42 km/h) | 43.69 mph (70.31 km/h) |
| 50 mph (80.47 km/h) | 48.54 mph (78.12 km/h) |
| 55 mph (88.51 km/h) | 53.4 mph (85.93 km/h) |
| 60 mph (96.56 km/h) | 58.25 mph (93.75 km/h) |
| 65 mph (104.61 km/h) | 63.11 mph (101.56 km/h) |
| 70 mph (112.65 km/h) | 67.96 mph (109.37 km/h) |
| 75 mph (120.7 km/h) | 72.81 mph (117.18 km/h) |
| 80 mph (128.75 km/h) | 77.67 mph (125 km/h) |
| 85 mph (136.79 km/h) | 82.52 mph (132.81 km/h) |
| 90 mph (144.84 km/h) | 87.38 mph (140.62 km/h) |
| 95 mph (152.89 km/h) | 92.23 mph (148.43 km/h) |
| 100 mph (160.93 km/h) | 97.09 mph (156.25 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 |
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