Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/50-18 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.04 (712.2) | 27.25 (692.2) | -0.79 (-20) -2.8% |
| Width inches (mm) | 10.04 (255) | 9.25 (235) | -0.79 (-20) -7.8% |
| Circum. inches (mm) | 88.09 (2237.44) | 85.61 (2174.61) | -2.47 (-62.83) -2.8% |
| Sidewall Height inches (mm) | 5.02 (127.5) | 4.63 (117.5) | -0.39 (-10) -7.8% |
| Revolutions per mile (km) | 719.28 (446.94) | 740.06 (459.85) | 20.78 (12.91) 2.9% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.44 mph (31.28 km/h) |
| 25 mph (40.23 km/h) | 24.3 mph (39.1 km/h) |
| 30 mph (48.28 km/h) | 29.16 mph (46.92 km/h) |
| 35 mph (56.33 km/h) | 34.02 mph (54.75 km/h) |
| 40 mph (64.37 km/h) | 38.88 mph (62.57 km/h) |
| 45 mph (72.42 km/h) | 43.74 mph (70.39 km/h) |
| 50 mph (80.47 km/h) | 48.6 mph (78.21 km/h) |
| 55 mph (88.51 km/h) | 53.46 mph (86.03 km/h) |
| 60 mph (96.56 km/h) | 58.32 mph (93.85 km/h) |
| 65 mph (104.61 km/h) | 63.17 mph (101.67 km/h) |
| 70 mph (112.65 km/h) | 68.03 mph (109.49 km/h) |
| 75 mph (120.7 km/h) | 72.89 mph (117.31 km/h) |
| 80 mph (128.75 km/h) | 77.75 mph (125.13 km/h) |
| 85 mph (136.79 km/h) | 82.61 mph (132.95 km/h) |
| 90 mph (144.84 km/h) | 87.47 mph (140.77 km/h) |
| 95 mph (152.89 km/h) | 92.33 mph (148.59 km/h) |
| 100 mph (160.93 km/h) | 97.19 mph (156.42 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
