Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 325/45-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 35.52 (902.1) | 8.12 (206.2) 29.6% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 86.07 (2186.23) | 111.58 (2834.03) | 25.5 (647.8) 29.6% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 5.76 (146.25) | 2.56 (65) 80% |
| Revolutions per mile (km) | 736.13 (457.41) | 567.86 (352.85) | -168.26 (-104.55) -22.9% |
325/45-24 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.93 mph (41.72 km/h) |
| 25 mph (40.23 km/h) | 32.41 mph (52.16 km/h) |
| 30 mph (48.28 km/h) | 38.89 mph (62.59 km/h) |
| 35 mph (56.33 km/h) | 45.37 mph (73.02 km/h) |
| 40 mph (64.37 km/h) | 51.85 mph (83.45 km/h) |
| 45 mph (72.42 km/h) | 58.33 mph (93.88 km/h) |
| 50 mph (80.47 km/h) | 64.82 mph (104.31 km/h) |
| 55 mph (88.51 km/h) | 71.3 mph (114.74 km/h) |
| 60 mph (96.56 km/h) | 77.78 mph (125.17 km/h) |
| 65 mph (104.61 km/h) | 84.26 mph (135.6 km/h) |
| 70 mph (112.65 km/h) | 90.74 mph (146.03 km/h) |
| 75 mph (120.7 km/h) | 97.22 mph (156.47 km/h) |
| 80 mph (128.75 km/h) | 103.7 mph (166.9 km/h) |
| 85 mph (136.79 km/h) | 110.19 mph (177.33 km/h) |
| 90 mph (144.84 km/h) | 116.67 mph (187.76 km/h) |
| 95 mph (152.89 km/h) | 123.15 mph (198.19 km/h) |
| 100 mph (160.93 km/h) | 129.63 mph (208.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1445 | 1679 | 1808 | 1888 | 1974 | 2035 | 2103 | 2183 | 2294 | 2404 | 2527 | 2626 | 2804 | 3001 | 3155 | 3253 | 3308 | 3511 | 3794 | 4409 |
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