Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 355/30-25 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 33.39 (848) | 5.4 (137.1) 19.3% |
| Width inches (mm) | 13.98 (355) | 13.98 (355) | 0 (0) 0% |
| Circum. inches (mm) | 87.93 (2233.36) | 104.88 (2664.07) | 16.96 (430.71) 19.3% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 4.19 (106.5) | 0.7 (17.75) 20% |
| Revolutions per mile (km) | 720.59 (447.76) | 604.09 (375.36) | -116.5 (-72.39) -16.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.86 mph (38.39 km/h) |
| 25 mph (40.23 km/h) | 29.82 mph (47.99 km/h) |
| 30 mph (48.28 km/h) | 35.79 mph (57.59 km/h) |
| 35 mph (56.33 km/h) | 41.75 mph (67.19 km/h) |
| 40 mph (64.37 km/h) | 47.71 mph (76.79 km/h) |
| 45 mph (72.42 km/h) | 53.68 mph (86.39 km/h) |
| 50 mph (80.47 km/h) | 59.64 mph (95.99 km/h) |
| 55 mph (88.51 km/h) | 65.61 mph (105.58 km/h) |
| 60 mph (96.56 km/h) | 71.57 mph (115.18 km/h) |
| 65 mph (104.61 km/h) | 77.54 mph (124.78 km/h) |
| 70 mph (112.65 km/h) | 83.5 mph (134.38 km/h) |
| 75 mph (120.7 km/h) | 89.46 mph (143.98 km/h) |
| 80 mph (128.75 km/h) | 95.43 mph (153.58 km/h) |
| 85 mph (136.79 km/h) | 101.39 mph (163.18 km/h) |
| 90 mph (144.84 km/h) | 107.36 mph (172.77 km/h) |
| 95 mph (152.89 km/h) | 113.32 mph (182.37 km/h) |
| 100 mph (160.93 km/h) | 119.29 mph (191.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1537 | 1786 | 1923 | 2008 | 2100 | 2165 | 2237 | 2322 | 2440 | 2558 | 2689 | 2793 | 2983 | 3192 | 3356 | 3461 | 3519 | 3735 | 4036 | 4690 |
Better Fuel Economy Factory Ratios Increased Power
