Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-18 | 255/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.65 (702.2) | 28.04 (712.2) | 0.39 (10) 1.4% |
| Width inches (mm) | 9.65 (245) | 10.04 (255) | 0.39 (10) 4.1% |
| Circum. inches (mm) | 86.85 (2206.03) | 88.09 (2237.44) | 1.24 (31.42) 1.4% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 5.02 (127.5) | 0.2 (5) 4.1% |
| Revolutions per mile (km) | 729.52 (453.3) | 719.28 (446.94) | -10.24 (-6.36) -1.4% |
255/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.28 mph (32.65 km/h) |
| 25 mph (40.23 km/h) | 25.36 mph (40.81 km/h) |
| 30 mph (48.28 km/h) | 30.43 mph (48.97 km/h) |
| 35 mph (56.33 km/h) | 35.5 mph (57.13 km/h) |
| 40 mph (64.37 km/h) | 40.57 mph (65.29 km/h) |
| 45 mph (72.42 km/h) | 45.64 mph (73.45 km/h) |
| 50 mph (80.47 km/h) | 50.71 mph (81.61 km/h) |
| 55 mph (88.51 km/h) | 55.78 mph (89.77 km/h) |
| 60 mph (96.56 km/h) | 60.85 mph (97.94 km/h) |
| 65 mph (104.61 km/h) | 65.93 mph (106.1 km/h) |
| 70 mph (112.65 km/h) | 71 mph (114.26 km/h) |
| 75 mph (120.7 km/h) | 76.07 mph (122.42 km/h) |
| 80 mph (128.75 km/h) | 81.14 mph (130.58 km/h) |
| 85 mph (136.79 km/h) | 86.21 mph (138.74 km/h) |
| 90 mph (144.84 km/h) | 91.28 mph (146.9 km/h) |
| 95 mph (152.89 km/h) | 96.35 mph (155.07 km/h) |
| 100 mph (160.93 km/h) | 101.42 mph (163.23 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1830 | 2126 | 2290 | 2391 | 2500 | 2578 | 2664 | 2765 | 2905 | 3046 | 3201 | 3326 | 3552 | 3801 | 3996 | 4120 | 4191 | 4448 | 4806 | 5585 |
Better Fuel Economy Factory Ratios Increased Power
