Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 285/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 25.98 (659.8) | -2.01 (-51.1) -7.2% |
| Width inches (mm) | 13.98 (355) | 11.22 (285) | -2.76 (-70) -19.7% |
| Circum. inches (mm) | 87.93 (2233.36) | 81.61 (2072.82) | -6.32 (-160.54) -7.2% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 4.49 (114) | 0.99 (25.25) 28.5% |
| Revolutions per mile (km) | 720.59 (447.76) | 776.4 (482.43) | 55.81 (34.68) 7.7% |
285/40-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.56 mph (29.87 km/h) |
| 25 mph (40.23 km/h) | 23.2 mph (37.34 km/h) |
| 30 mph (48.28 km/h) | 27.84 mph (44.81 km/h) |
| 35 mph (56.33 km/h) | 32.48 mph (52.28 km/h) |
| 40 mph (64.37 km/h) | 37.12 mph (59.75 km/h) |
| 45 mph (72.42 km/h) | 41.77 mph (67.21 km/h) |
| 50 mph (80.47 km/h) | 46.41 mph (74.68 km/h) |
| 55 mph (88.51 km/h) | 51.05 mph (82.15 km/h) |
| 60 mph (96.56 km/h) | 55.69 mph (89.62 km/h) |
| 65 mph (104.61 km/h) | 60.33 mph (97.09 km/h) |
| 70 mph (112.65 km/h) | 64.97 mph (104.56 km/h) |
| 75 mph (120.7 km/h) | 69.61 mph (112.02 km/h) |
| 80 mph (128.75 km/h) | 74.25 mph (119.49 km/h) |
| 85 mph (136.79 km/h) | 78.89 mph (126.96 km/h) |
| 90 mph (144.84 km/h) | 83.53 mph (134.43 km/h) |
| 95 mph (152.89 km/h) | 88.17 mph (141.9 km/h) |
| 100 mph (160.93 km/h) | 92.81 mph (149.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1976 | 2295 | 2472 | 2581 | 2699 | 2783 | 2875 | 2985 | 3136 | 3287 | 3456 | 3590 | 3834 | 4103 | 4313 | 4448 | 4523 | 4801 | 5188 | 6028 |
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