Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/85-18 | 35/11.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.07 (941.7) | 35.01 (889.36) | -2.06 (-52.34) -5.6% |
| Width inches (mm) | 11.22 (285) | 11.5 (292) | 0.28 (7) 2.5% |
| Circum. inches (mm) | 116.47 (2958.44) | 110 (2794.01) | -6.47 (-164.43) -5.6% |
| Sidewall Height inches (mm) | 9.54 (242.25) | 8.51 (216.08) | -1.03 (-26.17) -10.8% |
| Revolutions per mile (km) | 543.98 (338.02) | 576 (357.91) | 32.01 (19.89) 5.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.89 mph (30.4 km/h) |
| 25 mph (40.23 km/h) | 23.61 mph (38 km/h) |
| 30 mph (48.28 km/h) | 28.33 mph (45.6 km/h) |
| 35 mph (56.33 km/h) | 33.05 mph (53.2 km/h) |
| 40 mph (64.37 km/h) | 37.78 mph (60.8 km/h) |
| 45 mph (72.42 km/h) | 42.5 mph (68.4 km/h) |
| 50 mph (80.47 km/h) | 47.22 mph (75.99 km/h) |
| 55 mph (88.51 km/h) | 51.94 mph (83.59 km/h) |
| 60 mph (96.56 km/h) | 56.67 mph (91.19 km/h) |
| 65 mph (104.61 km/h) | 61.39 mph (98.79 km/h) |
| 70 mph (112.65 km/h) | 66.11 mph (106.39 km/h) |
| 75 mph (120.7 km/h) | 70.83 mph (113.99 km/h) |
| 80 mph (128.75 km/h) | 75.55 mph (121.59 km/h) |
| 85 mph (136.79 km/h) | 80.28 mph (129.19 km/h) |
| 90 mph (144.84 km/h) | 85 mph (136.79 km/h) |
| 95 mph (152.89 km/h) | 89.72 mph (144.39 km/h) |
| 100 mph (160.93 km/h) | 94.44 mph (151.99 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1466 | 1703 | 1834 | 1915 | 2002 | 2065 | 2133 | 2214 | 2327 | 2439 | 2564 | 2663 | 2844 | 3044 | 3200 | 3300 | 3356 | 3562 | 3849 | 4472 |
Better Fuel Economy Factory Ratios Increased Power
