Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/90-15 | 170/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.92 (633) | 25.71 (653) | 0.79 (20) 3.2% |
| Width inches (mm) | 5.51 (140) | 6.69 (170) | 1.18 (30) 21.4% |
| Circum. inches (mm) | 78.29 (1988.63) | 80.77 (2051.46) | 2.47 (62.83) 3.2% |
| Sidewall Height inches (mm) | 4.96 (126) | 5.35 (136) | 0.39 (10) 7.9% |
| Revolutions per mile (km) | 809.27 (502.86) | 784.49 (487.46) | -24.79 (-15.4) -3.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.63 mph (33.2 km/h) |
| 25 mph (40.23 km/h) | 25.79 mph (41.5 km/h) |
| 30 mph (48.28 km/h) | 30.95 mph (49.81 km/h) |
| 35 mph (56.33 km/h) | 36.11 mph (58.11 km/h) |
| 40 mph (64.37 km/h) | 41.26 mph (66.41 km/h) |
| 45 mph (72.42 km/h) | 46.42 mph (74.71 km/h) |
| 50 mph (80.47 km/h) | 51.58 mph (83.01 km/h) |
| 55 mph (88.51 km/h) | 56.74 mph (91.31 km/h) |
| 60 mph (96.56 km/h) | 61.9 mph (99.61 km/h) |
| 65 mph (104.61 km/h) | 67.05 mph (107.91 km/h) |
| 70 mph (112.65 km/h) | 72.21 mph (116.21 km/h) |
| 75 mph (120.7 km/h) | 77.37 mph (124.51 km/h) |
| 80 mph (128.75 km/h) | 82.53 mph (132.82 km/h) |
| 85 mph (136.79 km/h) | 87.69 mph (141.12 km/h) |
| 90 mph (144.84 km/h) | 92.84 mph (149.42 km/h) |
| 95 mph (152.89 km/h) | 98 mph (157.72 km/h) |
| 100 mph (160.93 km/h) | 103.16 mph (166.02 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1996 | 2319 | 2498 | 2608 | 2727 | 2812 | 2905 | 3016 | 3169 | 3322 | 3492 | 3627 | 3874 | 4146 | 4358 | 4494 | 4570 | 4851 | 5242 | 6091 |
Better Fuel Economy Factory Ratios Increased Power
