Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/45-18 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.04 (686.7) | 27.25 (692.2) | 0.22 (5.5) 0.8% |
| Width inches (mm) | 10.04 (255) | 9.25 (235) | -0.79 (-20) -7.8% |
| Circum. inches (mm) | 84.93 (2157.33) | 85.61 (2174.61) | 0.68 (17.28) 0.8% |
| Sidewall Height inches (mm) | 4.52 (114.75) | 4.63 (117.5) | 0.11 (2.75) 2.4% |
| Revolutions per mile (km) | 745.99 (463.53) | 740.06 (459.85) | -5.93 (-3.68) -0.8% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.16 mph (32.44 km/h) |
| 25 mph (40.23 km/h) | 25.2 mph (40.56 km/h) |
| 30 mph (48.28 km/h) | 30.24 mph (48.67 km/h) |
| 35 mph (56.33 km/h) | 35.28 mph (56.78 km/h) |
| 40 mph (64.37 km/h) | 40.32 mph (64.89 km/h) |
| 45 mph (72.42 km/h) | 45.36 mph (73 km/h) |
| 50 mph (80.47 km/h) | 50.4 mph (81.11 km/h) |
| 55 mph (88.51 km/h) | 55.44 mph (89.22 km/h) |
| 60 mph (96.56 km/h) | 60.48 mph (97.33 km/h) |
| 65 mph (104.61 km/h) | 65.52 mph (105.45 km/h) |
| 70 mph (112.65 km/h) | 70.56 mph (113.56 km/h) |
| 75 mph (120.7 km/h) | 75.6 mph (121.67 km/h) |
| 80 mph (128.75 km/h) | 80.64 mph (129.78 km/h) |
| 85 mph (136.79 km/h) | 85.68 mph (137.89 km/h) |
| 90 mph (144.84 km/h) | 90.72 mph (146 km/h) |
| 95 mph (152.89 km/h) | 95.76 mph (154.11 km/h) |
| 100 mph (160.93 km/h) | 100.8 mph (162.22 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1883 | 2188 | 2356 | 2460 | 2573 | 2653 | 2741 | 2845 | 2989 | 3134 | 3294 | 3422 | 3654 | 3911 | 4111 | 4239 | 4312 | 4576 | 4945 | 5746 |
Better Fuel Economy Factory Ratios Increased Power
