Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/25-21 | 285/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.81 (680.9) | 25.98 (659.8) | -0.83 (-21.1) -3.1% |
| Width inches (mm) | 11.61 (295) | 11.22 (285) | -0.39 (-10) -3.4% |
| Circum. inches (mm) | 84.22 (2139.11) | 81.61 (2072.82) | -2.61 (-66.29) -3.1% |
| Sidewall Height inches (mm) | 2.9 (73.75) | 4.49 (114) | 1.58 (40.25) 54.6% |
| Revolutions per mile (km) | 752.34 (467.48) | 776.4 (482.43) | 24.06 (14.95) 3.2% |
285/40-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.38 mph (31.19 km/h) |
| 25 mph (40.23 km/h) | 24.23 mph (38.99 km/h) |
| 30 mph (48.28 km/h) | 29.07 mph (46.78 km/h) |
| 35 mph (56.33 km/h) | 33.92 mph (54.58 km/h) |
| 40 mph (64.37 km/h) | 38.76 mph (62.38 km/h) |
| 45 mph (72.42 km/h) | 43.61 mph (70.18 km/h) |
| 50 mph (80.47 km/h) | 48.45 mph (77.97 km/h) |
| 55 mph (88.51 km/h) | 53.3 mph (85.77 km/h) |
| 60 mph (96.56 km/h) | 58.14 mph (93.57 km/h) |
| 65 mph (104.61 km/h) | 62.99 mph (101.37 km/h) |
| 70 mph (112.65 km/h) | 67.83 mph (109.16 km/h) |
| 75 mph (120.7 km/h) | 72.68 mph (116.96 km/h) |
| 80 mph (128.75 km/h) | 77.52 mph (124.76 km/h) |
| 85 mph (136.79 km/h) | 82.37 mph (132.56 km/h) |
| 90 mph (144.84 km/h) | 87.21 mph (140.35 km/h) |
| 95 mph (152.89 km/h) | 92.06 mph (148.15 km/h) |
| 100 mph (160.93 km/h) | 96.9 mph (155.95 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 |
Better Fuel Economy Factory Ratios Increased Power
