Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 275/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 37.49 (952.2) | 7.09 (180) 23.3% |
| Width inches (mm) | 6.89 (175) | 10.83 (275) | 3.94 (100) 57.1% |
| Circum. inches (mm) | 95.51 (2425.94) | 117.77 (2991.42) | 22.26 (565.49) 23.3% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 9.74 (247.5) | 3.54 (90) 57.1% |
| Revolutions per mile (km) | 663.39 (412.21) | 537.99 (334.29) | -125.4 (-77.92) -18.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.66 mph (39.69 km/h) |
| 25 mph (40.23 km/h) | 30.83 mph (49.61 km/h) |
| 30 mph (48.28 km/h) | 36.99 mph (59.53 km/h) |
| 35 mph (56.33 km/h) | 43.16 mph (69.46 km/h) |
| 40 mph (64.37 km/h) | 49.32 mph (79.38 km/h) |
| 45 mph (72.42 km/h) | 55.49 mph (89.3 km/h) |
| 50 mph (80.47 km/h) | 61.66 mph (99.22 km/h) |
| 55 mph (88.51 km/h) | 67.82 mph (109.15 km/h) |
| 60 mph (96.56 km/h) | 73.99 mph (119.07 km/h) |
| 65 mph (104.61 km/h) | 80.15 mph (128.99 km/h) |
| 70 mph (112.65 km/h) | 86.32 mph (138.91 km/h) |
| 75 mph (120.7 km/h) | 92.48 mph (148.84 km/h) |
| 80 mph (128.75 km/h) | 98.65 mph (158.76 km/h) |
| 85 mph (136.79 km/h) | 104.81 mph (168.68 km/h) |
| 90 mph (144.84 km/h) | 110.98 mph (178.6 km/h) |
| 95 mph (152.89 km/h) | 117.14 mph (188.53 km/h) |
| 100 mph (160.93 km/h) | 123.31 mph (198.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1369 | 1590 | 1713 | 1789 | 1870 | 1928 | 1992 | 2068 | 2173 | 2278 | 2394 | 2488 | 2657 | 2843 | 2989 | 3082 | 3134 | 3327 | 3595 | 4177 |
Better Fuel Economy Factory Ratios Increased Power
