Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/85-18 | 165/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.37 (720.7) | 28.39 (721.2) | 0.02 (0.5) 0.1% |
| Width inches (mm) | 6.1 (155) | 6.5 (165) | 0.39 (10) 6.5% |
| Circum. inches (mm) | 89.14 (2264.15) | 89.2 (2265.72) | 0.06 (1.57) 0.1% |
| Sidewall Height inches (mm) | 5.19 (131.75) | 5.2 (132) | 0.01 (0.25) 0.2% |
| Revolutions per mile (km) | 710.8 (441.67) | 710.3 (441.36) | -0.49 (-0.31) -0.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.01 mph (32.21 km/h) |
| 25 mph (40.23 km/h) | 25.02 mph (40.26 km/h) |
| 30 mph (48.28 km/h) | 30.02 mph (48.31 km/h) |
| 35 mph (56.33 km/h) | 35.02 mph (56.37 km/h) |
| 40 mph (64.37 km/h) | 40.03 mph (64.42 km/h) |
| 45 mph (72.42 km/h) | 45.03 mph (72.47 km/h) |
| 50 mph (80.47 km/h) | 50.03 mph (80.52 km/h) |
| 55 mph (88.51 km/h) | 55.04 mph (88.58 km/h) |
| 60 mph (96.56 km/h) | 60.04 mph (96.63 km/h) |
| 65 mph (104.61 km/h) | 65.05 mph (104.68 km/h) |
| 70 mph (112.65 km/h) | 70.05 mph (112.73 km/h) |
| 75 mph (120.7 km/h) | 75.05 mph (120.78 km/h) |
| 80 mph (128.75 km/h) | 80.06 mph (128.84 km/h) |
| 85 mph (136.79 km/h) | 85.06 mph (136.89 km/h) |
| 90 mph (144.84 km/h) | 90.06 mph (144.94 km/h) |
| 95 mph (152.89 km/h) | 95.07 mph (152.99 km/h) |
| 100 mph (160.93 km/h) | 100.07 mph (161.05 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1808 | 2100 | 2261 | 2361 | 2469 | 2546 | 2631 | 2731 | 2869 | 3008 | 3161 | 3284 | 3507 | 3754 | 3946 | 4069 | 4138 | 4392 | 4746 | 5515 |
Better Fuel Economy Factory Ratios Increased Power
