Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 32.07 (814.7) | 1.67 (42.5) 5.5% |
| Width inches (mm) | 6.89 (175) | 10.83 (275) | 3.94 (100) 57.1% |
| Circum. inches (mm) | 95.51 (2425.94) | 100.77 (2559.46) | 5.26 (133.52) 5.5% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 7.04 (178.75) | 0.84 (21.25) 13.5% |
| Revolutions per mile (km) | 663.39 (412.21) | 628.78 (390.71) | -34.61 (-21.5) -5.2% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.1 mph (33.96 km/h) |
| 25 mph (40.23 km/h) | 26.38 mph (42.45 km/h) |
| 30 mph (48.28 km/h) | 31.65 mph (50.94 km/h) |
| 35 mph (56.33 km/h) | 36.93 mph (59.43 km/h) |
| 40 mph (64.37 km/h) | 42.2 mph (67.92 km/h) |
| 45 mph (72.42 km/h) | 47.48 mph (76.41 km/h) |
| 50 mph (80.47 km/h) | 52.75 mph (84.9 km/h) |
| 55 mph (88.51 km/h) | 58.03 mph (93.39 km/h) |
| 60 mph (96.56 km/h) | 63.3 mph (101.88 km/h) |
| 65 mph (104.61 km/h) | 68.58 mph (110.36 km/h) |
| 70 mph (112.65 km/h) | 73.85 mph (118.85 km/h) |
| 75 mph (120.7 km/h) | 79.13 mph (127.34 km/h) |
| 80 mph (128.75 km/h) | 84.4 mph (135.83 km/h) |
| 85 mph (136.79 km/h) | 89.68 mph (144.32 km/h) |
| 90 mph (144.84 km/h) | 94.95 mph (152.81 km/h) |
| 95 mph (152.89 km/h) | 100.23 mph (161.3 km/h) |
| 100 mph (160.93 km/h) | 105.5 mph (169.79 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1600 | 1859 | 2002 | 2090 | 2186 | 2254 | 2329 | 2417 | 2540 | 2662 | 2799 | 2907 | 3105 | 3323 | 3493 | 3602 | 3663 | 3888 | 4201 | 4882 |
Better Fuel Economy Factory Ratios Increased Power
