Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-18 | 275/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.98 (685.2) | 25.58 (649.7) | -1.4 (-35.5) -5.2% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 84.75 (2152.62) | 80.36 (2041.09) | -4.39 (-111.53) -5.2% |
| Sidewall Height inches (mm) | 4.49 (114) | 3.79 (96.25) | -0.7 (-17.75) -15.6% |
| Revolutions per mile (km) | 747.62 (464.55) | 788.47 (489.93) | 40.85 (25.38) 5.5% |
275/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.96 mph (30.52 km/h) |
| 25 mph (40.23 km/h) | 23.7 mph (38.15 km/h) |
| 30 mph (48.28 km/h) | 28.45 mph (45.78 km/h) |
| 35 mph (56.33 km/h) | 33.19 mph (53.41 km/h) |
| 40 mph (64.37 km/h) | 37.93 mph (61.04 km/h) |
| 45 mph (72.42 km/h) | 42.67 mph (68.67 km/h) |
| 50 mph (80.47 km/h) | 47.41 mph (76.3 km/h) |
| 55 mph (88.51 km/h) | 52.15 mph (83.93 km/h) |
| 60 mph (96.56 km/h) | 56.89 mph (91.56 km/h) |
| 65 mph (104.61 km/h) | 61.63 mph (99.19 km/h) |
| 70 mph (112.65 km/h) | 66.37 mph (106.82 km/h) |
| 75 mph (120.7 km/h) | 71.11 mph (114.45 km/h) |
| 80 mph (128.75 km/h) | 75.86 mph (122.08 km/h) |
| 85 mph (136.79 km/h) | 80.6 mph (129.71 km/h) |
| 90 mph (144.84 km/h) | 85.34 mph (137.34 km/h) |
| 95 mph (152.89 km/h) | 90.08 mph (144.97 km/h) |
| 100 mph (160.93 km/h) | 94.82 mph (152.6 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2007 | 2331 | 2510 | 2621 | 2741 | 2826 | 2920 | 3031 | 3185 | 3338 | 3509 | 3646 | 3893 | 4167 | 4380 | 4517 | 4594 | 4875 | 5268 | 6122 |
Better Fuel Economy Factory Ratios Increased Power
