Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 220/70-14 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.13 (663.6) | 27.25 (692.2) | 1.13 (28.6) 4.3% |
| Width inches (mm) | 8.66 (220) | 9.25 (235) | 0.59 (15) 6.8% |
| Circum. inches (mm) | 82.08 (2084.76) | 85.61 (2174.61) | 3.54 (89.85) 4.3% |
| Sidewall Height inches (mm) | 6.06 (154) | 4.63 (117.5) | -1.44 (-36.5) -23.7% |
| Revolutions per mile (km) | 771.96 (479.67) | 740.06 (459.85) | -31.9 (-19.82) -4.1% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.86 mph (33.57 km/h) |
| 25 mph (40.23 km/h) | 26.08 mph (41.97 km/h) |
| 30 mph (48.28 km/h) | 31.29 mph (50.36 km/h) |
| 35 mph (56.33 km/h) | 36.51 mph (58.75 km/h) |
| 40 mph (64.37 km/h) | 41.72 mph (67.15 km/h) |
| 45 mph (72.42 km/h) | 46.94 mph (75.54 km/h) |
| 50 mph (80.47 km/h) | 52.15 mph (83.94 km/h) |
| 55 mph (88.51 km/h) | 57.37 mph (92.33 km/h) |
| 60 mph (96.56 km/h) | 62.59 mph (100.72 km/h) |
| 65 mph (104.61 km/h) | 67.8 mph (109.12 km/h) |
| 70 mph (112.65 km/h) | 73.02 mph (117.51 km/h) |
| 75 mph (120.7 km/h) | 78.23 mph (125.9 km/h) |
| 80 mph (128.75 km/h) | 83.45 mph (134.3 km/h) |
| 85 mph (136.79 km/h) | 88.66 mph (142.69 km/h) |
| 90 mph (144.84 km/h) | 93.88 mph (151.08 km/h) |
| 95 mph (152.89 km/h) | 99.09 mph (159.48 km/h) |
| 100 mph (160.93 km/h) | 104.31 mph (167.87 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
