Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 230/60-15 | 170/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657) | 25.71 (653) | -0.16 (-4) -0.6% |
| Width inches (mm) | 9.06 (230) | 6.69 (170) | -2.36 (-60) -26.1% |
| Circum. inches (mm) | 81.26 (2064.03) | 80.77 (2051.46) | -0.49 (-12.57) -0.6% |
| Sidewall Height inches (mm) | 5.43 (138) | 5.35 (136) | -0.08 (-2) -1.4% |
| Revolutions per mile (km) | 779.71 (484.49) | 784.49 (487.46) | 4.78 (2.97) 0.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.88 mph (31.99 km/h) |
| 25 mph (40.23 km/h) | 24.85 mph (39.99 km/h) |
| 30 mph (48.28 km/h) | 29.82 mph (47.99 km/h) |
| 35 mph (56.33 km/h) | 34.79 mph (55.98 km/h) |
| 40 mph (64.37 km/h) | 39.76 mph (63.98 km/h) |
| 45 mph (72.42 km/h) | 44.73 mph (71.98 km/h) |
| 50 mph (80.47 km/h) | 49.7 mph (79.98 km/h) |
| 55 mph (88.51 km/h) | 54.67 mph (87.98 km/h) |
| 60 mph (96.56 km/h) | 59.63 mph (95.97 km/h) |
| 65 mph (104.61 km/h) | 64.6 mph (103.97 km/h) |
| 70 mph (112.65 km/h) | 69.57 mph (111.97 km/h) |
| 75 mph (120.7 km/h) | 74.54 mph (119.97 km/h) |
| 80 mph (128.75 km/h) | 79.51 mph (127.96 km/h) |
| 85 mph (136.79 km/h) | 84.48 mph (135.96 km/h) |
| 90 mph (144.84 km/h) | 89.45 mph (143.96 km/h) |
| 95 mph (152.89 km/h) | 94.42 mph (151.96 km/h) |
| 100 mph (160.93 km/h) | 99.39 mph (159.95 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
