Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 345/25-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 27.79 (705.9) | -0.2 (-5) -0.7% |
| Width inches (mm) | 13.98 (355) | 13.58 (345) | -0.39 (-10) -2.8% |
| Circum. inches (mm) | 87.93 (2233.36) | 87.31 (2217.65) | -0.62 (-15.71) -0.7% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 3.4 (86.25) | -0.1 (-2.5) -2.8% |
| Revolutions per mile (km) | 720.59 (447.76) | 725.7 (450.93) | 5.1 (3.17) 0.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.86 mph (31.96 km/h) |
| 25 mph (40.23 km/h) | 24.82 mph (39.95 km/h) |
| 30 mph (48.28 km/h) | 29.79 mph (47.94 km/h) |
| 35 mph (56.33 km/h) | 34.75 mph (55.93 km/h) |
| 40 mph (64.37 km/h) | 39.72 mph (63.92 km/h) |
| 45 mph (72.42 km/h) | 44.68 mph (71.91 km/h) |
| 50 mph (80.47 km/h) | 49.65 mph (79.9 km/h) |
| 55 mph (88.51 km/h) | 54.61 mph (87.89 km/h) |
| 60 mph (96.56 km/h) | 59.58 mph (95.88 km/h) |
| 65 mph (104.61 km/h) | 64.54 mph (103.87 km/h) |
| 70 mph (112.65 km/h) | 69.51 mph (111.86 km/h) |
| 75 mph (120.7 km/h) | 74.47 mph (119.85 km/h) |
| 80 mph (128.75 km/h) | 79.44 mph (127.84 km/h) |
| 85 mph (136.79 km/h) | 84.4 mph (135.83 km/h) |
| 90 mph (144.84 km/h) | 89.37 mph (143.82 km/h) |
| 95 mph (152.89 km/h) | 94.33 mph (151.81 km/h) |
| 100 mph (160.93 km/h) | 99.3 mph (159.8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1847 | 2145 | 2310 | 2413 | 2523 | 2601 | 2688 | 2790 | 2931 | 3073 | 3230 | 3356 | 3584 | 3835 | 4031 | 4157 | 4228 | 4487 | 4849 | 5635 |
Better Fuel Economy Factory Ratios Increased Power
