Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/60-18 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.63 (727.2) | 27.25 (692.2) | -1.38 (-35) -4.8% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 89.94 (2284.57) | 85.61 (2174.61) | -4.33 (-109.96) -4.8% |
| Sidewall Height inches (mm) | 5.31 (135) | 4.63 (117.5) | -0.69 (-17.5) -13% |
| Revolutions per mile (km) | 704.44 (437.72) | 740.06 (459.85) | 35.62 (22.13) 5.1% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.04 mph (30.64 km/h) |
| 25 mph (40.23 km/h) | 23.8 mph (38.3 km/h) |
| 30 mph (48.28 km/h) | 28.56 mph (45.96 km/h) |
| 35 mph (56.33 km/h) | 33.32 mph (53.62 km/h) |
| 40 mph (64.37 km/h) | 38.07 mph (61.28 km/h) |
| 45 mph (72.42 km/h) | 42.83 mph (68.94 km/h) |
| 50 mph (80.47 km/h) | 47.59 mph (76.59 km/h) |
| 55 mph (88.51 km/h) | 52.35 mph (84.25 km/h) |
| 60 mph (96.56 km/h) | 57.11 mph (91.91 km/h) |
| 65 mph (104.61 km/h) | 61.87 mph (99.57 km/h) |
| 70 mph (112.65 km/h) | 66.63 mph (107.23 km/h) |
| 75 mph (120.7 km/h) | 71.39 mph (114.89 km/h) |
| 80 mph (128.75 km/h) | 76.15 mph (122.55 km/h) |
| 85 mph (136.79 km/h) | 80.91 mph (130.21 km/h) |
| 90 mph (144.84 km/h) | 85.67 mph (137.87 km/h) |
| 95 mph (152.89 km/h) | 90.43 mph (145.53 km/h) |
| 100 mph (160.93 km/h) | 95.19 mph (153.19 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
