Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 365/25-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 28.19 (715.9) | 0.79 (20) 2.9% |
| Width inches (mm) | 12.8 (325) | 14.37 (365) | 1.57 (40) 12.3% |
| Circum. inches (mm) | 86.07 (2186.23) | 88.55 (2249.07) | 2.47 (62.83) 2.9% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 3.59 (91.25) | 0.39 (10) 12.3% |
| Revolutions per mile (km) | 736.13 (457.41) | 715.56 (444.63) | -20.57 (-12.78) -2.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.57 mph (33.11 km/h) |
| 25 mph (40.23 km/h) | 25.72 mph (41.39 km/h) |
| 30 mph (48.28 km/h) | 30.86 mph (49.67 km/h) |
| 35 mph (56.33 km/h) | 36.01 mph (57.95 km/h) |
| 40 mph (64.37 km/h) | 41.15 mph (66.22 km/h) |
| 45 mph (72.42 km/h) | 46.29 mph (74.5 km/h) |
| 50 mph (80.47 km/h) | 51.44 mph (82.78 km/h) |
| 55 mph (88.51 km/h) | 56.58 mph (91.06 km/h) |
| 60 mph (96.56 km/h) | 61.72 mph (99.34 km/h) |
| 65 mph (104.61 km/h) | 66.87 mph (107.61 km/h) |
| 70 mph (112.65 km/h) | 72.01 mph (115.89 km/h) |
| 75 mph (120.7 km/h) | 77.16 mph (124.17 km/h) |
| 80 mph (128.75 km/h) | 82.3 mph (132.45 km/h) |
| 85 mph (136.79 km/h) | 87.44 mph (140.73 km/h) |
| 90 mph (144.84 km/h) | 92.59 mph (149 km/h) |
| 95 mph (152.89 km/h) | 97.73 mph (157.28 km/h) |
| 100 mph (160.93 km/h) | 102.87 mph (165.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1821 | 2115 | 2278 | 2379 | 2487 | 2565 | 2650 | 2751 | 2890 | 3030 | 3185 | 3309 | 3533 | 3781 | 3975 | 4099 | 4169 | 4425 | 4781 | 5556 |
Better Fuel Economy Factory Ratios Increased Power
