Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/65-17 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.03 (737.3) | 27.25 (692.2) | -1.78 (-45.1) -6.1% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 91.19 (2316.3) | 85.61 (2174.61) | -5.58 (-141.69) -6.1% |
| Sidewall Height inches (mm) | 6.01 (152.75) | 4.63 (117.5) | -1.39 (-35.25) -23.1% |
| Revolutions per mile (km) | 694.79 (431.72) | 740.06 (459.85) | 45.27 (28.13) 6.5% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.78 mph (30.22 km/h) |
| 25 mph (40.23 km/h) | 23.47 mph (37.77 km/h) |
| 30 mph (48.28 km/h) | 28.16 mph (45.33 km/h) |
| 35 mph (56.33 km/h) | 32.86 mph (52.88 km/h) |
| 40 mph (64.37 km/h) | 37.55 mph (60.44 km/h) |
| 45 mph (72.42 km/h) | 42.25 mph (67.99 km/h) |
| 50 mph (80.47 km/h) | 46.94 mph (75.55 km/h) |
| 55 mph (88.51 km/h) | 51.64 mph (83.1 km/h) |
| 60 mph (96.56 km/h) | 56.33 mph (90.65 km/h) |
| 65 mph (104.61 km/h) | 61.02 mph (98.21 km/h) |
| 70 mph (112.65 km/h) | 65.72 mph (105.76 km/h) |
| 75 mph (120.7 km/h) | 70.41 mph (113.32 km/h) |
| 80 mph (128.75 km/h) | 75.11 mph (120.87 km/h) |
| 85 mph (136.79 km/h) | 79.8 mph (128.43 km/h) |
| 90 mph (144.84 km/h) | 84.49 mph (135.98 km/h) |
| 95 mph (152.89 km/h) | 89.19 mph (143.54 km/h) |
| 100 mph (160.93 km/h) | 93.88 mph (151.09 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
