Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 280/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 27.61 (701.4) | -0.37 (-9.5) -1.3% |
| Width inches (mm) | 13.98 (355) | 11.02 (280) | -2.95 (-75) -21.1% |
| Circum. inches (mm) | 87.93 (2233.36) | 86.75 (2203.51) | -1.18 (-29.85) -1.3% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 3.31 (84) | -0.19 (-4.75) -5.4% |
| Revolutions per mile (km) | 720.59 (447.76) | 730.35 (453.82) | 9.76 (6.06) 1.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.73 mph (31.76 km/h) |
| 25 mph (40.23 km/h) | 24.67 mph (39.7 km/h) |
| 30 mph (48.28 km/h) | 29.6 mph (47.64 km/h) |
| 35 mph (56.33 km/h) | 34.53 mph (55.57 km/h) |
| 40 mph (64.37 km/h) | 39.47 mph (63.51 km/h) |
| 45 mph (72.42 km/h) | 44.4 mph (71.45 km/h) |
| 50 mph (80.47 km/h) | 49.33 mph (79.39 km/h) |
| 55 mph (88.51 km/h) | 54.27 mph (87.33 km/h) |
| 60 mph (96.56 km/h) | 59.2 mph (95.27 km/h) |
| 65 mph (104.61 km/h) | 64.13 mph (103.21 km/h) |
| 70 mph (112.65 km/h) | 69.06 mph (111.15 km/h) |
| 75 mph (120.7 km/h) | 74 mph (119.09 km/h) |
| 80 mph (128.75 km/h) | 78.93 mph (127.03 km/h) |
| 85 mph (136.79 km/h) | 83.86 mph (134.97 km/h) |
| 90 mph (144.84 km/h) | 88.8 mph (142.91 km/h) |
| 95 mph (152.89 km/h) | 93.73 mph (150.84 km/h) |
| 100 mph (160.93 km/h) | 98.66 mph (158.78 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1859 | 2159 | 2325 | 2428 | 2539 | 2618 | 2705 | 2808 | 2950 | 3092 | 3251 | 3377 | 3606 | 3860 | 4057 | 4184 | 4255 | 4516 | 4880 | 5671 |
Better Fuel Economy Factory Ratios Increased Power
