Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/30-19 | 345/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.68 (677.6) | 28.15 (715) | 1.47 (37.4) 5.5% |
| Width inches (mm) | 12.8 (325) | 13.58 (345) | 0.79 (20) 6.2% |
| Circum. inches (mm) | 83.81 (2128.74) | 88.43 (2246.24) | 4.63 (117.5) 5.5% |
| Sidewall Height inches (mm) | 3.84 (97.5) | 4.07 (103.5) | 0.24 (6) 6.2% |
| Revolutions per mile (km) | 756.01 (469.76) | 716.46 (445.19) | -39.54 (-24.57) -5.2% |
345/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.1 mph (33.96 km/h) |
| 25 mph (40.23 km/h) | 26.38 mph (42.45 km/h) |
| 30 mph (48.28 km/h) | 31.66 mph (50.95 km/h) |
| 35 mph (56.33 km/h) | 36.93 mph (59.44 km/h) |
| 40 mph (64.37 km/h) | 42.21 mph (67.93 km/h) |
| 45 mph (72.42 km/h) | 47.48 mph (76.42 km/h) |
| 50 mph (80.47 km/h) | 52.76 mph (84.91 km/h) |
| 55 mph (88.51 km/h) | 58.04 mph (93.4 km/h) |
| 60 mph (96.56 km/h) | 63.31 mph (101.89 km/h) |
| 65 mph (104.61 km/h) | 68.59 mph (110.38 km/h) |
| 70 mph (112.65 km/h) | 73.86 mph (118.87 km/h) |
| 75 mph (120.7 km/h) | 79.14 mph (127.36 km/h) |
| 80 mph (128.75 km/h) | 84.42 mph (135.85 km/h) |
| 85 mph (136.79 km/h) | 89.69 mph (144.34 km/h) |
| 90 mph (144.84 km/h) | 94.97 mph (152.84 km/h) |
| 95 mph (152.89 km/h) | 100.24 mph (161.33 km/h) |
| 100 mph (160.93 km/h) | 105.52 mph (169.82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1823 | 2118 | 2281 | 2382 | 2490 | 2568 | 2653 | 2754 | 2894 | 3034 | 3189 | 3313 | 3538 | 3786 | 3980 | 4104 | 4174 | 4430 | 4787 | 5563 |
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