Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/30-21 | 405/35-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.68 (728.4) | 35.16 (893.1) | 6.48 (164.7) 22.6% |
| Width inches (mm) | 12.8 (325) | 15.94 (405) | 3.15 (80) 24.6% |
| Circum. inches (mm) | 90.09 (2288.34) | 110.46 (2805.76) | 20.37 (517.42) 22.6% |
| Sidewall Height inches (mm) | 3.84 (97.5) | 5.58 (141.75) | 1.74 (44.25) 45.4% |
| Revolutions per mile (km) | 703.28 (437) | 573.59 (356.41) | -129.69 (-80.59) -18.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.52 mph (39.46 km/h) |
| 25 mph (40.23 km/h) | 30.65 mph (49.33 km/h) |
| 30 mph (48.28 km/h) | 36.78 mph (59.2 km/h) |
| 35 mph (56.33 km/h) | 42.91 mph (69.06 km/h) |
| 40 mph (64.37 km/h) | 49.04 mph (78.93 km/h) |
| 45 mph (72.42 km/h) | 55.18 mph (88.8 km/h) |
| 50 mph (80.47 km/h) | 61.31 mph (98.66 km/h) |
| 55 mph (88.51 km/h) | 67.44 mph (108.53 km/h) |
| 60 mph (96.56 km/h) | 73.57 mph (118.39 km/h) |
| 65 mph (104.61 km/h) | 79.7 mph (128.26 km/h) |
| 70 mph (112.65 km/h) | 85.83 mph (138.13 km/h) |
| 75 mph (120.7 km/h) | 91.96 mph (147.99 km/h) |
| 80 mph (128.75 km/h) | 98.09 mph (157.86 km/h) |
| 85 mph (136.79 km/h) | 104.22 mph (167.73 km/h) |
| 90 mph (144.84 km/h) | 110.35 mph (177.59 km/h) |
| 95 mph (152.89 km/h) | 116.48 mph (187.46 km/h) |
| 100 mph (160.93 km/h) | 122.61 mph (197.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1460 | 1696 | 1826 | 1907 | 1994 | 2056 | 2124 | 2205 | 2317 | 2429 | 2553 | 2652 | 2832 | 3031 | 3186 | 3286 | 3342 | 3547 | 3832 | 4454 |
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