Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 325/70-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 39.91 (1013.8) | 11.93 (302.9) 42.6% |
| Width inches (mm) | 13.98 (355) | 12.8 (325) | -1.18 (-30) -8.5% |
| Circum. inches (mm) | 87.93 (2233.36) | 125.39 (3184.95) | 37.46 (951.59) 42.6% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 8.96 (227.5) | 5.46 (138.75) 156.3% |
| Revolutions per mile (km) | 720.59 (447.76) | 505.3 (313.98) | -215.3 (-133.78) -29.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 28.52 mph (45.9 km/h) |
| 25 mph (40.23 km/h) | 35.65 mph (57.38 km/h) |
| 30 mph (48.28 km/h) | 42.78 mph (68.85 km/h) |
| 35 mph (56.33 km/h) | 49.91 mph (80.33 km/h) |
| 40 mph (64.37 km/h) | 57.04 mph (91.8 km/h) |
| 45 mph (72.42 km/h) | 64.17 mph (103.28 km/h) |
| 50 mph (80.47 km/h) | 71.3 mph (114.75 km/h) |
| 55 mph (88.51 km/h) | 78.43 mph (126.23 km/h) |
| 60 mph (96.56 km/h) | 85.56 mph (137.7 km/h) |
| 65 mph (104.61 km/h) | 92.7 mph (149.18 km/h) |
| 70 mph (112.65 km/h) | 99.83 mph (160.65 km/h) |
| 75 mph (120.7 km/h) | 106.96 mph (172.13 km/h) |
| 80 mph (128.75 km/h) | 114.09 mph (183.6 km/h) |
| 85 mph (136.79 km/h) | 121.22 mph (195.08 km/h) |
| 90 mph (144.84 km/h) | 128.35 mph (206.56 km/h) |
| 95 mph (152.89 km/h) | 135.48 mph (218.03 km/h) |
| 100 mph (160.93 km/h) | 142.61 mph (229.51 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1286 | 1494 | 1609 | 1680 | 1756 | 1811 | 1871 | 1943 | 2041 | 2139 | 2249 | 2336 | 2495 | 2670 | 2807 | 2895 | 2944 | 3124 | 3376 | 3923 |
Better Fuel Economy Factory Ratios Increased Power
