Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 355/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 26.99 (685.5) | -1 (-25.4) -3.6% |
| Width inches (mm) | 13.98 (355) | 13.98 (355) | 0 (0) 0% |
| Circum. inches (mm) | 87.93 (2233.36) | 84.79 (2153.56) | -3.14 (-79.8) -3.6% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 3.49 (88.75) | 0 (0) 0% |
| Revolutions per mile (km) | 720.59 (447.76) | 747.29 (464.35) | 26.7 (16.59) 3.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.29 mph (31.04 km/h) |
| 25 mph (40.23 km/h) | 24.11 mph (38.8 km/h) |
| 30 mph (48.28 km/h) | 28.93 mph (46.56 km/h) |
| 35 mph (56.33 km/h) | 33.75 mph (54.31 km/h) |
| 40 mph (64.37 km/h) | 38.57 mph (62.07 km/h) |
| 45 mph (72.42 km/h) | 43.39 mph (69.83 km/h) |
| 50 mph (80.47 km/h) | 48.21 mph (77.59 km/h) |
| 55 mph (88.51 km/h) | 53.03 mph (85.35 km/h) |
| 60 mph (96.56 km/h) | 57.86 mph (93.11 km/h) |
| 65 mph (104.61 km/h) | 62.68 mph (100.87 km/h) |
| 70 mph (112.65 km/h) | 67.5 mph (108.63 km/h) |
| 75 mph (120.7 km/h) | 72.32 mph (116.39 km/h) |
| 80 mph (128.75 km/h) | 77.14 mph (124.15 km/h) |
| 85 mph (136.79 km/h) | 81.96 mph (131.91 km/h) |
| 90 mph (144.84 km/h) | 86.78 mph (139.67 km/h) |
| 95 mph (152.89 km/h) | 91.61 mph (147.43 km/h) |
| 100 mph (160.93 km/h) | 96.43 mph (155.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1902 | 2209 | 2379 | 2484 | 2598 | 2679 | 2768 | 2873 | 3018 | 3164 | 3326 | 3455 | 3690 | 3949 | 4151 | 4281 | 4354 | 4621 | 4993 | 5802 |
Better Fuel Economy Factory Ratios Increased Power
