Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 280/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 37.84 (961.2) | 7.44 (189) 24.5% |
| Width inches (mm) | 6.89 (175) | 11.02 (280) | 4.13 (105) 60% |
| Circum. inches (mm) | 95.51 (2425.94) | 118.89 (3019.7) | 23.38 (593.76) 24.5% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 9.92 (252) | 3.72 (94.5) 60% |
| Revolutions per mile (km) | 663.39 (412.21) | 532.95 (331.16) | -130.44 (-81.05) -19.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.9 mph (40.06 km/h) |
| 25 mph (40.23 km/h) | 31.12 mph (50.08 km/h) |
| 30 mph (48.28 km/h) | 37.34 mph (60.1 km/h) |
| 35 mph (56.33 km/h) | 43.57 mph (70.11 km/h) |
| 40 mph (64.37 km/h) | 49.79 mph (80.13 km/h) |
| 45 mph (72.42 km/h) | 56.01 mph (90.15 km/h) |
| 50 mph (80.47 km/h) | 62.24 mph (100.16 km/h) |
| 55 mph (88.51 km/h) | 68.46 mph (110.18 km/h) |
| 60 mph (96.56 km/h) | 74.69 mph (120.19 km/h) |
| 65 mph (104.61 km/h) | 80.91 mph (130.21 km/h) |
| 70 mph (112.65 km/h) | 87.13 mph (140.23 km/h) |
| 75 mph (120.7 km/h) | 93.36 mph (150.24 km/h) |
| 80 mph (128.75 km/h) | 99.58 mph (160.26 km/h) |
| 85 mph (136.79 km/h) | 105.8 mph (170.28 km/h) |
| 90 mph (144.84 km/h) | 112.03 mph (180.29 km/h) |
| 95 mph (152.89 km/h) | 118.25 mph (190.31 km/h) |
| 100 mph (160.93 km/h) | 124.48 mph (200.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1356 | 1576 | 1697 | 1772 | 1853 | 1910 | 1974 | 2049 | 2153 | 2257 | 2372 | 2464 | 2632 | 2816 | 2961 | 3053 | 3105 | 3295 | 3561 | 4138 |
Better Fuel Economy Factory Ratios Increased Power
