Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 275/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 36.41 (924.7) | 6 (152.5) 19.7% |
| Width inches (mm) | 6.89 (175) | 10.83 (275) | 3.94 (100) 57.1% |
| Circum. inches (mm) | 95.51 (2425.94) | 114.37 (2905.03) | 18.86 (479.09) 19.7% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 9.2 (233.75) | 3 (76.25) 48.4% |
| Revolutions per mile (km) | 663.39 (412.21) | 553.99 (344.23) | -109.41 (-67.98) -16.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.95 mph (38.54 km/h) |
| 25 mph (40.23 km/h) | 29.94 mph (48.18 km/h) |
| 30 mph (48.28 km/h) | 35.92 mph (57.82 km/h) |
| 35 mph (56.33 km/h) | 41.91 mph (67.45 km/h) |
| 40 mph (64.37 km/h) | 47.9 mph (77.09 km/h) |
| 45 mph (72.42 km/h) | 53.89 mph (86.72 km/h) |
| 50 mph (80.47 km/h) | 59.87 mph (96.36 km/h) |
| 55 mph (88.51 km/h) | 65.86 mph (105.99 km/h) |
| 60 mph (96.56 km/h) | 71.85 mph (115.63 km/h) |
| 65 mph (104.61 km/h) | 77.84 mph (125.27 km/h) |
| 70 mph (112.65 km/h) | 83.82 mph (134.9 km/h) |
| 75 mph (120.7 km/h) | 89.81 mph (144.54 km/h) |
| 80 mph (128.75 km/h) | 95.8 mph (154.17 km/h) |
| 85 mph (136.79 km/h) | 101.79 mph (163.81 km/h) |
| 90 mph (144.84 km/h) | 107.77 mph (173.45 km/h) |
| 95 mph (152.89 km/h) | 113.76 mph (183.08 km/h) |
| 100 mph (160.93 km/h) | 119.75 mph (192.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1410 | 1638 | 1764 | 1842 | 1926 | 1986 | 2052 | 2130 | 2238 | 2346 | 2466 | 2562 | 2736 | 2928 | 3078 | 3174 | 3228 | 3425 | 3701 | 4301 |
Better Fuel Economy Factory Ratios Increased Power
