Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-18 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.18 (715.7) | 27.25 (692.2) | -0.93 (-23.5) -3.3% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 88.52 (2248.44) | 85.61 (2174.61) | -2.91 (-73.83) -3.3% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 4.63 (117.5) | -0.46 (-11.75) -9.1% |
| Revolutions per mile (km) | 715.76 (444.75) | 740.06 (459.85) | 24.3 (15.1) 3.4% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.34 mph (31.13 km/h) |
| 25 mph (40.23 km/h) | 24.18 mph (38.91 km/h) |
| 30 mph (48.28 km/h) | 29.01 mph (46.7 km/h) |
| 35 mph (56.33 km/h) | 33.85 mph (54.48 km/h) |
| 40 mph (64.37 km/h) | 38.69 mph (62.26 km/h) |
| 45 mph (72.42 km/h) | 43.52 mph (70.04 km/h) |
| 50 mph (80.47 km/h) | 48.36 mph (77.83 km/h) |
| 55 mph (88.51 km/h) | 53.19 mph (85.61 km/h) |
| 60 mph (96.56 km/h) | 58.03 mph (93.39 km/h) |
| 65 mph (104.61 km/h) | 62.87 mph (101.17 km/h) |
| 70 mph (112.65 km/h) | 67.7 mph (108.96 km/h) |
| 75 mph (120.7 km/h) | 72.54 mph (116.74 km/h) |
| 80 mph (128.75 km/h) | 77.37 mph (124.52 km/h) |
| 85 mph (136.79 km/h) | 82.21 mph (132.3 km/h) |
| 90 mph (144.84 km/h) | 87.04 mph (140.09 km/h) |
| 95 mph (152.89 km/h) | 91.88 mph (147.87 km/h) |
| 100 mph (160.93 km/h) | 96.72 mph (155.65 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
