Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/50-17 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.86 (656.8) | 27.25 (692.2) | 1.39 (35.4) 5.4% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 81.24 (2063.4) | 85.61 (2174.61) | 4.38 (111.21) 5.4% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 4.63 (117.5) | 0.2 (5) 4.4% |
| Revolutions per mile (km) | 779.95 (484.64) | 740.06 (459.85) | -39.89 (-24.78) -5.1% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.08 mph (33.92 km/h) |
| 25 mph (40.23 km/h) | 26.35 mph (42.4 km/h) |
| 30 mph (48.28 km/h) | 31.62 mph (50.88 km/h) |
| 35 mph (56.33 km/h) | 36.89 mph (59.36 km/h) |
| 40 mph (64.37 km/h) | 42.16 mph (67.84 km/h) |
| 45 mph (72.42 km/h) | 47.43 mph (76.32 km/h) |
| 50 mph (80.47 km/h) | 52.69 mph (84.8 km/h) |
| 55 mph (88.51 km/h) | 57.96 mph (93.28 km/h) |
| 60 mph (96.56 km/h) | 63.23 mph (101.77 km/h) |
| 65 mph (104.61 km/h) | 68.5 mph (110.25 km/h) |
| 70 mph (112.65 km/h) | 73.77 mph (118.73 km/h) |
| 75 mph (120.7 km/h) | 79.04 mph (127.21 km/h) |
| 80 mph (128.75 km/h) | 84.31 mph (135.69 km/h) |
| 85 mph (136.79 km/h) | 89.58 mph (144.17 km/h) |
| 90 mph (144.84 km/h) | 94.85 mph (152.65 km/h) |
| 95 mph (152.89 km/h) | 100.12 mph (161.13 km/h) |
| 100 mph (160.93 km/h) | 105.39 mph (169.61 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
