Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/70-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.71 (856.2) | 32.07 (814.7) | -1.63 (-41.5) -4.8% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 105.9 (2689.83) | 100.77 (2559.46) | -5.13 (-130.38) -4.8% |
| Sidewall Height inches (mm) | 7.85 (199.5) | 7.04 (178.75) | -0.82 (-20.75) -10.4% |
| Revolutions per mile (km) | 598.31 (371.77) | 628.78 (390.71) | 30.48 (18.94) 5.1% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.03 mph (30.63 km/h) |
| 25 mph (40.23 km/h) | 23.79 mph (38.28 km/h) |
| 30 mph (48.28 km/h) | 28.55 mph (45.94 km/h) |
| 35 mph (56.33 km/h) | 33.3 mph (53.6 km/h) |
| 40 mph (64.37 km/h) | 38.06 mph (61.25 km/h) |
| 45 mph (72.42 km/h) | 42.82 mph (68.91 km/h) |
| 50 mph (80.47 km/h) | 47.58 mph (76.57 km/h) |
| 55 mph (88.51 km/h) | 52.33 mph (84.22 km/h) |
| 60 mph (96.56 km/h) | 57.09 mph (91.88 km/h) |
| 65 mph (104.61 km/h) | 61.85 mph (99.54 km/h) |
| 70 mph (112.65 km/h) | 66.61 mph (107.19 km/h) |
| 75 mph (120.7 km/h) | 71.36 mph (114.85 km/h) |
| 80 mph (128.75 km/h) | 76.12 mph (122.51 km/h) |
| 85 mph (136.79 km/h) | 80.88 mph (130.16 km/h) |
| 90 mph (144.84 km/h) | 85.64 mph (137.82 km/h) |
| 95 mph (152.89 km/h) | 90.4 mph (145.48 km/h) |
| 100 mph (160.93 km/h) | 95.15 mph (153.13 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
