Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/90-15 | 170/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.57 (624) | 25.71 (653) | 1.14 (29) 4.6% |
| Width inches (mm) | 5.31 (135) | 6.69 (170) | 1.38 (35) 25.9% |
| Circum. inches (mm) | 77.18 (1960.35) | 80.77 (2051.46) | 3.59 (91.11) 4.6% |
| Sidewall Height inches (mm) | 4.78 (121.5) | 5.35 (136) | 0.57 (14.5) 11.9% |
| Revolutions per mile (km) | 820.95 (510.11) | 784.49 (487.46) | -36.46 (-22.65) -4.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.93 mph (33.68 km/h) |
| 25 mph (40.23 km/h) | 26.16 mph (42.1 km/h) |
| 30 mph (48.28 km/h) | 31.39 mph (50.52 km/h) |
| 35 mph (56.33 km/h) | 36.63 mph (58.94 km/h) |
| 40 mph (64.37 km/h) | 41.86 mph (67.37 km/h) |
| 45 mph (72.42 km/h) | 47.09 mph (75.79 km/h) |
| 50 mph (80.47 km/h) | 52.32 mph (84.21 km/h) |
| 55 mph (88.51 km/h) | 57.56 mph (92.63 km/h) |
| 60 mph (96.56 km/h) | 62.79 mph (101.05 km/h) |
| 65 mph (104.61 km/h) | 68.02 mph (109.47 km/h) |
| 70 mph (112.65 km/h) | 73.25 mph (117.89 km/h) |
| 75 mph (120.7 km/h) | 78.49 mph (126.31 km/h) |
| 80 mph (128.75 km/h) | 83.72 mph (134.73 km/h) |
| 85 mph (136.79 km/h) | 88.95 mph (143.15 km/h) |
| 90 mph (144.84 km/h) | 94.18 mph (151.57 km/h) |
| 95 mph (152.89 km/h) | 99.42 mph (159.99 km/h) |
| 100 mph (160.93 km/h) | 104.65 mph (168.41 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
