Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 355/25-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 36.99 (939.5) | 9 (228.6) 32.2% |
| Width inches (mm) | 13.98 (355) | 13.98 (355) | 0 (0) 0% |
| Circum. inches (mm) | 87.93 (2233.36) | 116.2 (2951.53) | 28.27 (718.17) 32.2% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 3.49 (88.75) | 0 (0) 0% |
| Revolutions per mile (km) | 720.59 (447.76) | 545.26 (338.81) | -175.34 (-108.95) -24.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.43 mph (42.54 km/h) |
| 25 mph (40.23 km/h) | 33.04 mph (53.17 km/h) |
| 30 mph (48.28 km/h) | 39.65 mph (63.81 km/h) |
| 35 mph (56.33 km/h) | 46.25 mph (74.44 km/h) |
| 40 mph (64.37 km/h) | 52.86 mph (85.07 km/h) |
| 45 mph (72.42 km/h) | 59.47 mph (95.71 km/h) |
| 50 mph (80.47 km/h) | 66.08 mph (106.34 km/h) |
| 55 mph (88.51 km/h) | 72.69 mph (116.98 km/h) |
| 60 mph (96.56 km/h) | 79.29 mph (127.61 km/h) |
| 65 mph (104.61 km/h) | 85.9 mph (138.25 km/h) |
| 70 mph (112.65 km/h) | 92.51 mph (148.88 km/h) |
| 75 mph (120.7 km/h) | 99.12 mph (159.51 km/h) |
| 80 mph (128.75 km/h) | 105.73 mph (170.15 km/h) |
| 85 mph (136.79 km/h) | 112.33 mph (180.78 km/h) |
| 90 mph (144.84 km/h) | 118.94 mph (191.42 km/h) |
| 95 mph (152.89 km/h) | 125.55 mph (202.05 km/h) |
| 100 mph (160.93 km/h) | 132.16 mph (212.69 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1388 | 1612 | 1736 | 1813 | 1895 | 1954 | 2019 | 2096 | 2202 | 2309 | 2427 | 2521 | 2692 | 2881 | 3029 | 3124 | 3177 | 3372 | 3643 | 4234 |
Better Fuel Economy Factory Ratios Increased Power
