Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 175/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 24.13 (613) | -3.85 (-97.9) -13.8% |
| Width inches (mm) | 13.98 (355) | 6.89 (175) | -7.09 (-180) -50.7% |
| Circum. inches (mm) | 87.93 (2233.36) | 75.82 (1925.8) | -12.11 (-307.56) -13.8% |
| 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) | 835.68 (519.26) | 115.08 (71.51) 16% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.25 mph (27.75 km/h) |
| 25 mph (40.23 km/h) | 21.56 mph (34.69 km/h) |
| 30 mph (48.28 km/h) | 25.87 mph (41.63 km/h) |
| 35 mph (56.33 km/h) | 30.18 mph (48.57 km/h) |
| 40 mph (64.37 km/h) | 34.49 mph (55.51 km/h) |
| 45 mph (72.42 km/h) | 38.8 mph (62.45 km/h) |
| 50 mph (80.47 km/h) | 43.11 mph (69.39 km/h) |
| 55 mph (88.51 km/h) | 47.43 mph (76.32 km/h) |
| 60 mph (96.56 km/h) | 51.74 mph (83.26 km/h) |
| 65 mph (104.61 km/h) | 56.05 mph (90.2 km/h) |
| 70 mph (112.65 km/h) | 60.36 mph (97.14 km/h) |
| 75 mph (120.7 km/h) | 64.67 mph (104.08 km/h) |
| 80 mph (128.75 km/h) | 68.98 mph (111.02 km/h) |
| 85 mph (136.79 km/h) | 73.29 mph (117.96 km/h) |
| 90 mph (144.84 km/h) | 77.61 mph (124.89 km/h) |
| 95 mph (152.89 km/h) | 81.92 mph (131.83 km/h) |
| 100 mph (160.93 km/h) | 86.23 mph (138.77 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2127 | 2471 | 2661 | 2778 | 2905 | 2995 | 3095 | 3213 | 3375 | 3538 | 3719 | 3864 | 4127 | 4416 | 4642 | 4787 | 4869 | 5167 | 5584 | 6489 |
Better Fuel Economy Factory Ratios Increased Power
