Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 25/11.5-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 25.05 (636.2) | -2.94 (-74.7) -10.5% |
| Width inches (mm) | 13.98 (355) | 11.5 (292) | -2.48 (-63) -17.7% |
| Circum. inches (mm) | 87.93 (2233.36) | 78.69 (1998.68) | -9.24 (-234.68) -10.5% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 4.02 (102.2) | 0.53 (13.45) 15.2% |
| Revolutions per mile (km) | 720.59 (447.76) | 805.2 (500.33) | 84.61 (52.57) 11.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.9 mph (28.8 km/h) |
| 25 mph (40.23 km/h) | 22.37 mph (36.01 km/h) |
| 30 mph (48.28 km/h) | 26.85 mph (43.21 km/h) |
| 35 mph (56.33 km/h) | 31.32 mph (50.41 km/h) |
| 40 mph (64.37 km/h) | 35.8 mph (57.61 km/h) |
| 45 mph (72.42 km/h) | 40.27 mph (64.81 km/h) |
| 50 mph (80.47 km/h) | 44.75 mph (72.01 km/h) |
| 55 mph (88.51 km/h) | 49.22 mph (79.21 km/h) |
| 60 mph (96.56 km/h) | 53.7 mph (86.41 km/h) |
| 65 mph (104.61 km/h) | 58.17 mph (93.62 km/h) |
| 70 mph (112.65 km/h) | 62.64 mph (100.82 km/h) |
| 75 mph (120.7 km/h) | 67.12 mph (108.02 km/h) |
| 80 mph (128.75 km/h) | 71.59 mph (115.22 km/h) |
| 85 mph (136.79 km/h) | 76.07 mph (122.42 km/h) |
| 90 mph (144.84 km/h) | 80.54 mph (129.62 km/h) |
| 95 mph (152.89 km/h) | 85.02 mph (136.82 km/h) |
| 100 mph (160.93 km/h) | 89.49 mph (144.02 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2049 | 2380 | 2564 | 2677 | 2799 | 2886 | 2982 | 3095 | 3252 | 3409 | 3584 | 3723 | 3976 | 4255 | 4473 | 4613 | 4691 | 4979 | 5380 | 6252 |
Better Fuel Economy Factory Ratios Increased Power
