Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 325/40-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 34.24 (869.6) | 6.25 (158.7) 22.3% |
| Width inches (mm) | 13.98 (355) | 12.8 (325) | -1.18 (-30) -8.5% |
| Circum. inches (mm) | 87.93 (2233.36) | 107.56 (2731.93) | 19.63 (498.57) 22.3% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 5.12 (130) | 1.62 (41.25) 46.5% |
| Revolutions per mile (km) | 720.59 (447.76) | 589.09 (366.04) | -131.51 (-81.71) -18.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.46 mph (39.37 km/h) |
| 25 mph (40.23 km/h) | 30.58 mph (49.22 km/h) |
| 30 mph (48.28 km/h) | 36.7 mph (59.06 km/h) |
| 35 mph (56.33 km/h) | 42.81 mph (68.9 km/h) |
| 40 mph (64.37 km/h) | 48.93 mph (78.74 km/h) |
| 45 mph (72.42 km/h) | 55.05 mph (88.59 km/h) |
| 50 mph (80.47 km/h) | 61.16 mph (98.43 km/h) |
| 55 mph (88.51 km/h) | 67.28 mph (108.27 km/h) |
| 60 mph (96.56 km/h) | 73.39 mph (118.12 km/h) |
| 65 mph (104.61 km/h) | 79.51 mph (127.96 km/h) |
| 70 mph (112.65 km/h) | 85.63 mph (137.8 km/h) |
| 75 mph (120.7 km/h) | 91.74 mph (147.65 km/h) |
| 80 mph (128.75 km/h) | 97.86 mph (157.49 km/h) |
| 85 mph (136.79 km/h) | 103.98 mph (167.33 km/h) |
| 90 mph (144.84 km/h) | 110.09 mph (177.18 km/h) |
| 95 mph (152.89 km/h) | 116.21 mph (187.02 km/h) |
| 100 mph (160.93 km/h) | 122.32 mph (196.86 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1499 | 1742 | 1875 | 1958 | 2048 | 2112 | 2182 | 2265 | 2379 | 2494 | 2622 | 2724 | 2909 | 3113 | 3273 | 3375 | 3432 | 3643 | 3936 | 4574 |
Better Fuel Economy Factory Ratios Increased Power
