Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/85-18 | 235/56-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.37 (720.7) | 28.36 (720.4) | -0.01 (-0.3) -0% |
| Width inches (mm) | 6.1 (155) | 9.25 (235) | 3.15 (80) 51.6% |
| Circum. inches (mm) | 89.14 (2264.15) | 89.1 (2263.2) | -0.04 (-0.94) -0% |
| Sidewall Height inches (mm) | 5.19 (131.75) | 5.18 (131.6) | -0.01 (-0.15) -0.1% |
| Revolutions per mile (km) | 710.8 (441.67) | 711.09 (441.85) | 0.3 (0.18) 0% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.99 mph (32.17 km/h) |
| 25 mph (40.23 km/h) | 24.99 mph (40.22 km/h) |
| 30 mph (48.28 km/h) | 29.99 mph (48.26 km/h) |
| 35 mph (56.33 km/h) | 34.99 mph (56.3 km/h) |
| 40 mph (64.37 km/h) | 39.98 mph (64.35 km/h) |
| 45 mph (72.42 km/h) | 44.98 mph (72.39 km/h) |
| 50 mph (80.47 km/h) | 49.98 mph (80.43 km/h) |
| 55 mph (88.51 km/h) | 54.98 mph (88.48 km/h) |
| 60 mph (96.56 km/h) | 59.98 mph (96.52 km/h) |
| 65 mph (104.61 km/h) | 64.97 mph (104.56 km/h) |
| 70 mph (112.65 km/h) | 69.97 mph (112.61 km/h) |
| 75 mph (120.7 km/h) | 74.97 mph (120.65 km/h) |
| 80 mph (128.75 km/h) | 79.97 mph (128.69 km/h) |
| 85 mph (136.79 km/h) | 84.96 mph (136.74 km/h) |
| 90 mph (144.84 km/h) | 89.96 mph (144.78 km/h) |
| 95 mph (152.89 km/h) | 94.96 mph (152.82 km/h) |
| 100 mph (160.93 km/h) | 99.96 mph (160.87 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1810 | 2102 | 2264 | 2364 | 2472 | 2549 | 2634 | 2734 | 2872 | 3011 | 3165 | 3288 | 3511 | 3758 | 3950 | 4074 | 4143 | 4397 | 4751 | 5521 |
Better Fuel Economy Factory Ratios Increased Power
