Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 275/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 35.32 (897.2) | 4.92 (125) 16.2% |
| Width inches (mm) | 6.89 (175) | 10.83 (275) | 3.94 (100) 57.1% |
| Circum. inches (mm) | 95.51 (2425.94) | 110.97 (2818.64) | 15.46 (392.7) 16.2% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 8.66 (220) | 2.46 (62.5) 39.7% |
| Revolutions per mile (km) | 663.39 (412.21) | 570.97 (354.78) | -92.43 (-57.43) -13.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.24 mph (37.4 km/h) |
| 25 mph (40.23 km/h) | 29.05 mph (46.75 km/h) |
| 30 mph (48.28 km/h) | 34.86 mph (56.1 km/h) |
| 35 mph (56.33 km/h) | 40.67 mph (65.45 km/h) |
| 40 mph (64.37 km/h) | 46.48 mph (74.79 km/h) |
| 45 mph (72.42 km/h) | 52.28 mph (84.14 km/h) |
| 50 mph (80.47 km/h) | 58.09 mph (93.49 km/h) |
| 55 mph (88.51 km/h) | 63.9 mph (102.84 km/h) |
| 60 mph (96.56 km/h) | 69.71 mph (112.19 km/h) |
| 65 mph (104.61 km/h) | 75.52 mph (121.54 km/h) |
| 70 mph (112.65 km/h) | 81.33 mph (130.89 km/h) |
| 75 mph (120.7 km/h) | 87.14 mph (140.24 km/h) |
| 80 mph (128.75 km/h) | 92.95 mph (149.59 km/h) |
| 85 mph (136.79 km/h) | 98.76 mph (158.94 km/h) |
| 90 mph (144.84 km/h) | 104.57 mph (168.29 km/h) |
| 95 mph (152.89 km/h) | 110.38 mph (177.64 km/h) |
| 100 mph (160.93 km/h) | 116.19 mph (186.99 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1453 | 1688 | 1818 | 1898 | 1985 | 2047 | 2115 | 2195 | 2306 | 2418 | 2541 | 2640 | 2819 | 3017 | 3172 | 3271 | 3326 | 3530 | 3815 | 4433 |
Better Fuel Economy Factory Ratios Increased Power
