Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-17 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.18 (690.3) | 27.25 (692.2) | 0.07 (1.9) 0.3% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 85.38 (2168.64) | 85.61 (2174.61) | 0.24 (5.97) 0.3% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 4.63 (117.5) | -0.46 (-11.75) -9.1% |
| Revolutions per mile (km) | 742.1 (461.12) | 740.06 (459.85) | -2.04 (-1.27) -0.3% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.06 mph (32.28 km/h) |
| 25 mph (40.23 km/h) | 25.07 mph (40.34 km/h) |
| 30 mph (48.28 km/h) | 30.08 mph (48.41 km/h) |
| 35 mph (56.33 km/h) | 35.1 mph (56.48 km/h) |
| 40 mph (64.37 km/h) | 40.11 mph (64.55 km/h) |
| 45 mph (72.42 km/h) | 45.12 mph (72.62 km/h) |
| 50 mph (80.47 km/h) | 50.14 mph (80.69 km/h) |
| 55 mph (88.51 km/h) | 55.15 mph (88.76 km/h) |
| 60 mph (96.56 km/h) | 60.17 mph (96.83 km/h) |
| 65 mph (104.61 km/h) | 65.18 mph (104.9 km/h) |
| 70 mph (112.65 km/h) | 70.19 mph (112.96 km/h) |
| 75 mph (120.7 km/h) | 75.21 mph (121.03 km/h) |
| 80 mph (128.75 km/h) | 80.22 mph (129.1 km/h) |
| 85 mph (136.79 km/h) | 85.23 mph (137.17 km/h) |
| 90 mph (144.84 km/h) | 90.25 mph (145.24 km/h) |
| 95 mph (152.89 km/h) | 95.26 mph (153.31 km/h) |
| 100 mph (160.93 km/h) | 100.28 mph (161.38 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
