Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 175/30-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 34.13 (867) | 6.15 (156.1) 22% |
| Width inches (mm) | 13.98 (355) | 6.89 (175) | -7.09 (-180) -50.7% |
| Circum. inches (mm) | 87.93 (2233.36) | 107.23 (2723.76) | 19.31 (490.4) 22% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 2.07 (52.5) | -1.43 (-36.25) -40.8% |
| Revolutions per mile (km) | 720.59 (447.76) | 590.85 (367.14) | -129.74 (-80.62) -18% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.39 mph (39.25 km/h) |
| 25 mph (40.23 km/h) | 30.49 mph (49.07 km/h) |
| 30 mph (48.28 km/h) | 36.59 mph (58.88 km/h) |
| 35 mph (56.33 km/h) | 42.69 mph (68.7 km/h) |
| 40 mph (64.37 km/h) | 48.78 mph (78.51 km/h) |
| 45 mph (72.42 km/h) | 54.88 mph (88.32 km/h) |
| 50 mph (80.47 km/h) | 60.98 mph (98.14 km/h) |
| 55 mph (88.51 km/h) | 67.08 mph (107.95 km/h) |
| 60 mph (96.56 km/h) | 73.17 mph (117.76 km/h) |
| 65 mph (104.61 km/h) | 79.27 mph (127.58 km/h) |
| 70 mph (112.65 km/h) | 85.37 mph (137.39 km/h) |
| 75 mph (120.7 km/h) | 91.47 mph (147.2 km/h) |
| 80 mph (128.75 km/h) | 97.57 mph (157.02 km/h) |
| 85 mph (136.79 km/h) | 103.66 mph (166.83 km/h) |
| 90 mph (144.84 km/h) | 109.76 mph (176.65 km/h) |
| 95 mph (152.89 km/h) | 115.86 mph (186.46 km/h) |
| 100 mph (160.93 km/h) | 121.96 mph (196.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1504 | 1747 | 1881 | 1964 | 2054 | 2118 | 2188 | 2271 | 2387 | 2502 | 2630 | 2732 | 2918 | 3122 | 3282 | 3385 | 3442 | 3653 | 3948 | 4588 |
Better Fuel Economy Factory Ratios Increased Power
