Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 27.25 (692.2) | 1.93 (49) 7.6% |
| Width inches (mm) | 6.1 (155) | 9.25 (235) | 3.15 (80) 51.6% |
| Circum. inches (mm) | 79.55 (2020.67) | 85.61 (2174.61) | 6.06 (153.94) 7.6% |
| Sidewall Height inches (mm) | 3.66 (93) | 4.63 (117.5) | 0.96 (24.5) 26.3% |
| Revolutions per mile (km) | 796.44 (494.88) | 740.06 (459.85) | -56.38 (-35.03) -7.1% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.52 mph (34.64 km/h) |
| 25 mph (40.23 km/h) | 26.9 mph (43.3 km/h) |
| 30 mph (48.28 km/h) | 32.29 mph (51.96 km/h) |
| 35 mph (56.33 km/h) | 37.67 mph (60.62 km/h) |
| 40 mph (64.37 km/h) | 43.05 mph (69.28 km/h) |
| 45 mph (72.42 km/h) | 48.43 mph (77.94 km/h) |
| 50 mph (80.47 km/h) | 53.81 mph (86.6 km/h) |
| 55 mph (88.51 km/h) | 59.19 mph (95.26 km/h) |
| 60 mph (96.56 km/h) | 64.57 mph (103.92 km/h) |
| 65 mph (104.61 km/h) | 69.95 mph (112.58 km/h) |
| 70 mph (112.65 km/h) | 75.33 mph (121.24 km/h) |
| 75 mph (120.7 km/h) | 80.71 mph (129.9 km/h) |
| 80 mph (128.75 km/h) | 86.09 mph (138.56 km/h) |
| 85 mph (136.79 km/h) | 91.48 mph (147.22 km/h) |
| 90 mph (144.84 km/h) | 96.86 mph (155.88 km/h) |
| 95 mph (152.89 km/h) | 102.24 mph (164.54 km/h) |
| 100 mph (160.93 km/h) | 107.62 mph (173.19 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
