Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-17 | 185/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.99 (634.8) | 27.2 (690.8) | 2.2 (56) 8.8% |
| Width inches (mm) | 5.71 (145) | 7.28 (185) | 1.57 (40) 27.6% |
| Circum. inches (mm) | 78.52 (1994.28) | 85.44 (2170.21) | 6.93 (175.93) 8.8% |
| Sidewall Height inches (mm) | 4 (101.5) | 5.1 (129.5) | 1.1 (28) 27.6% |
| Revolutions per mile (km) | 806.98 (501.43) | 741.56 (460.78) | -65.42 (-40.65) -8.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.76 mph (35.03 km/h) |
| 25 mph (40.23 km/h) | 27.21 mph (43.78 km/h) |
| 30 mph (48.28 km/h) | 32.65 mph (52.54 km/h) |
| 35 mph (56.33 km/h) | 38.09 mph (61.3 km/h) |
| 40 mph (64.37 km/h) | 43.53 mph (70.05 km/h) |
| 45 mph (72.42 km/h) | 48.97 mph (78.81 km/h) |
| 50 mph (80.47 km/h) | 54.41 mph (87.57 km/h) |
| 55 mph (88.51 km/h) | 59.85 mph (96.32 km/h) |
| 60 mph (96.56 km/h) | 65.29 mph (105.08 km/h) |
| 65 mph (104.61 km/h) | 70.73 mph (113.84 km/h) |
| 70 mph (112.65 km/h) | 76.18 mph (122.59 km/h) |
| 75 mph (120.7 km/h) | 81.62 mph (131.35 km/h) |
| 80 mph (128.75 km/h) | 87.06 mph (140.11 km/h) |
| 85 mph (136.79 km/h) | 92.5 mph (148.86 km/h) |
| 90 mph (144.84 km/h) | 97.94 mph (157.62 km/h) |
| 95 mph (152.89 km/h) | 103.38 mph (166.38 km/h) |
| 100 mph (160.93 km/h) | 108.82 mph (175.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1887 | 2192 | 2361 | 2465 | 2578 | 2658 | 2746 | 2851 | 2995 | 3140 | 3300 | 3429 | 3662 | 3919 | 4120 | 4248 | 4320 | 4585 | 4955 | 5758 |
Better Fuel Economy Factory Ratios Increased Power
