Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/55-18 | 210/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.8 (655.2) | 24.61 (625.2) | -1.18 (-30) -4.6% |
| Width inches (mm) | 7.09 (180) | 8.27 (210) | 1.18 (30) 16.7% |
| Circum. inches (mm) | 81.04 (2058.37) | 77.33 (1964.12) | -3.71 (-94.25) -4.6% |
| Sidewall Height inches (mm) | 3.9 (99) | 3.31 (84) | -0.59 (-15) -15.2% |
| Revolutions per mile (km) | 781.85 (485.82) | 819.37 (509.13) | 37.52 (23.31) 4.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.08 mph (30.71 km/h) |
| 25 mph (40.23 km/h) | 23.86 mph (38.39 km/h) |
| 30 mph (48.28 km/h) | 28.63 mph (46.07 km/h) |
| 35 mph (56.33 km/h) | 33.4 mph (53.75 km/h) |
| 40 mph (64.37 km/h) | 38.17 mph (61.43 km/h) |
| 45 mph (72.42 km/h) | 42.94 mph (69.1 km/h) |
| 50 mph (80.47 km/h) | 47.71 mph (76.78 km/h) |
| 55 mph (88.51 km/h) | 52.48 mph (84.46 km/h) |
| 60 mph (96.56 km/h) | 57.25 mph (92.14 km/h) |
| 65 mph (104.61 km/h) | 62.02 mph (99.82 km/h) |
| 70 mph (112.65 km/h) | 66.79 mph (107.5 km/h) |
| 75 mph (120.7 km/h) | 71.57 mph (115.17 km/h) |
| 80 mph (128.75 km/h) | 76.34 mph (122.85 km/h) |
| 85 mph (136.79 km/h) | 81.11 mph (130.53 km/h) |
| 90 mph (144.84 km/h) | 85.88 mph (138.21 km/h) |
| 95 mph (152.89 km/h) | 90.65 mph (145.89 km/h) |
| 100 mph (160.93 km/h) | 95.42 mph (153.57 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2085 | 2422 | 2609 | 2724 | 2848 | 2937 | 3035 | 3150 | 3310 | 3469 | 3647 | 3789 | 4046 | 4330 | 4552 | 4694 | 4774 | 5066 | 5475 | 6362 |
Better Fuel Economy Factory Ratios Increased Power
