Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 280/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 34.54 (877.2) | 4.13 (105) 13.6% |
| Width inches (mm) | 6.89 (175) | 11.02 (280) | 4.13 (105) 60% |
| Circum. inches (mm) | 95.51 (2425.94) | 108.5 (2755.81) | 12.99 (329.87) 13.6% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 8.27 (210) | 2.07 (52.5) 33.3% |
| Revolutions per mile (km) | 663.39 (412.21) | 583.98 (362.87) | -79.41 (-49.34) -12% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.72 mph (36.56 km/h) |
| 25 mph (40.23 km/h) | 28.4 mph (45.7 km/h) |
| 30 mph (48.28 km/h) | 34.08 mph (54.85 km/h) |
| 35 mph (56.33 km/h) | 39.76 mph (63.99 km/h) |
| 40 mph (64.37 km/h) | 45.44 mph (73.13 km/h) |
| 45 mph (72.42 km/h) | 51.12 mph (82.27 km/h) |
| 50 mph (80.47 km/h) | 56.8 mph (91.41 km/h) |
| 55 mph (88.51 km/h) | 62.48 mph (100.55 km/h) |
| 60 mph (96.56 km/h) | 68.16 mph (109.69 km/h) |
| 65 mph (104.61 km/h) | 73.84 mph (118.83 km/h) |
| 70 mph (112.65 km/h) | 79.52 mph (127.97 km/h) |
| 75 mph (120.7 km/h) | 85.2 mph (137.11 km/h) |
| 80 mph (128.75 km/h) | 90.88 mph (146.25 km/h) |
| 85 mph (136.79 km/h) | 96.56 mph (155.4 km/h) |
| 90 mph (144.84 km/h) | 102.24 mph (164.54 km/h) |
| 95 mph (152.89 km/h) | 107.92 mph (173.68 km/h) |
| 100 mph (160.93 km/h) | 113.6 mph (182.82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1486 | 1726 | 1859 | 1941 | 2030 | 2093 | 2163 | 2245 | 2359 | 2473 | 2599 | 2700 | 2884 | 3086 | 3244 | 3345 | 3402 | 3611 | 3902 | 4534 |
Better Fuel Economy Factory Ratios Increased Power
