Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 345/30-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 27.15 (689.6) | -0.25 (-6.3) -0.9% |
| Width inches (mm) | 12.8 (325) | 13.58 (345) | 0.79 (20) 6.2% |
| Circum. inches (mm) | 86.07 (2186.23) | 85.29 (2166.44) | -0.78 (-19.79) -0.9% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 4.07 (103.5) | 0.88 (22.25) 27.4% |
| Revolutions per mile (km) | 736.13 (457.41) | 742.85 (461.59) | 6.73 (4.18) 0.9% |
345/30-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.82 mph (31.9 km/h) |
| 25 mph (40.23 km/h) | 24.77 mph (39.87 km/h) |
| 30 mph (48.28 km/h) | 29.73 mph (47.84 km/h) |
| 35 mph (56.33 km/h) | 34.68 mph (55.82 km/h) |
| 40 mph (64.37 km/h) | 39.64 mph (63.79 km/h) |
| 45 mph (72.42 km/h) | 44.59 mph (71.76 km/h) |
| 50 mph (80.47 km/h) | 49.55 mph (79.74 km/h) |
| 55 mph (88.51 km/h) | 54.5 mph (87.71 km/h) |
| 60 mph (96.56 km/h) | 59.46 mph (95.69 km/h) |
| 65 mph (104.61 km/h) | 64.41 mph (103.66 km/h) |
| 70 mph (112.65 km/h) | 69.37 mph (111.63 km/h) |
| 75 mph (120.7 km/h) | 74.32 mph (119.61 km/h) |
| 80 mph (128.75 km/h) | 79.28 mph (127.58 km/h) |
| 85 mph (136.79 km/h) | 84.23 mph (135.56 km/h) |
| 90 mph (144.84 km/h) | 89.19 mph (143.53 km/h) |
| 95 mph (152.89 km/h) | 94.14 mph (151.5 km/h) |
| 100 mph (160.93 km/h) | 99.09 mph (159.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1890 | 2196 | 2365 | 2470 | 2582 | 2663 | 2751 | 2856 | 3001 | 3145 | 3306 | 3435 | 3668 | 3926 | 4127 | 4255 | 4328 | 4593 | 4963 | 5768 |
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