Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/60-17 | 225/85-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.03 (635.8) | 30.06 (763.5) | 5.03 (127.7) 20.1% |
| Width inches (mm) | 6.69 (170) | 8.86 (225) | 2.17 (55) 32.4% |
| Circum. inches (mm) | 78.64 (1997.42) | 94.43 (2398.61) | 15.79 (401.18) 20.1% |
| Sidewall Height inches (mm) | 4.02 (102) | 7.53 (191.25) | 3.51 (89.25) 87.5% |
| Revolutions per mile (km) | 805.71 (500.64) | 670.95 (416.91) | -134.76 (-83.74) -16.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.02 mph (38.65 km/h) |
| 25 mph (40.23 km/h) | 30.02 mph (48.31 km/h) |
| 30 mph (48.28 km/h) | 36.03 mph (57.98 km/h) |
| 35 mph (56.33 km/h) | 42.03 mph (67.64 km/h) |
| 40 mph (64.37 km/h) | 48.03 mph (77.3 km/h) |
| 45 mph (72.42 km/h) | 54.04 mph (86.97 km/h) |
| 50 mph (80.47 km/h) | 60.04 mph (96.63 km/h) |
| 55 mph (88.51 km/h) | 66.05 mph (106.29 km/h) |
| 60 mph (96.56 km/h) | 72.05 mph (115.96 km/h) |
| 65 mph (104.61 km/h) | 78.06 mph (125.62 km/h) |
| 70 mph (112.65 km/h) | 84.06 mph (135.28 km/h) |
| 75 mph (120.7 km/h) | 90.06 mph (144.94 km/h) |
| 80 mph (128.75 km/h) | 96.07 mph (154.61 km/h) |
| 85 mph (136.79 km/h) | 102.07 mph (164.27 km/h) |
| 90 mph (144.84 km/h) | 108.08 mph (173.93 km/h) |
| 95 mph (152.89 km/h) | 114.08 mph (183.6 km/h) |
| 100 mph (160.93 km/h) | 120.08 mph (193.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1707 | 1984 | 2136 | 2231 | 2332 | 2405 | 2485 | 2579 | 2710 | 2841 | 2986 | 3102 | 3313 | 3546 | 3727 | 3844 | 3909 | 4149 | 4483 | 5210 |
Better Fuel Economy Factory Ratios Increased Power
