Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/50-18 | 235/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.25 (692.2) | 28.18 (715.7) | 0.93 (23.5) 3.4% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 85.61 (2174.61) | 88.52 (2248.44) | 2.91 (73.83) 3.4% |
| Sidewall Height inches (mm) | 4.63 (117.5) | 5.09 (129.25) | 0.46 (11.75) 10% |
| Revolutions per mile (km) | 740.06 (459.85) | 715.76 (444.75) | -24.3 (-15.1) -3.3% |
235/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.68 mph (33.28 km/h) |
| 25 mph (40.23 km/h) | 25.85 mph (41.6 km/h) |
| 30 mph (48.28 km/h) | 31.02 mph (49.92 km/h) |
| 35 mph (56.33 km/h) | 36.19 mph (58.24 km/h) |
| 40 mph (64.37 km/h) | 41.36 mph (66.56 km/h) |
| 45 mph (72.42 km/h) | 46.53 mph (74.88 km/h) |
| 50 mph (80.47 km/h) | 51.7 mph (83.2 km/h) |
| 55 mph (88.51 km/h) | 56.87 mph (91.52 km/h) |
| 60 mph (96.56 km/h) | 62.04 mph (99.84 km/h) |
| 65 mph (104.61 km/h) | 67.21 mph (108.16 km/h) |
| 70 mph (112.65 km/h) | 72.38 mph (116.48 km/h) |
| 75 mph (120.7 km/h) | 77.55 mph (124.8 km/h) |
| 80 mph (128.75 km/h) | 82.72 mph (133.12 km/h) |
| 85 mph (136.79 km/h) | 87.89 mph (141.44 km/h) |
| 90 mph (144.84 km/h) | 93.06 mph (149.76 km/h) |
| 95 mph (152.89 km/h) | 98.23 mph (158.08 km/h) |
| 100 mph (160.93 km/h) | 103.39 mph (166.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1821 | 2116 | 2279 | 2380 | 2488 | 2566 | 2651 | 2752 | 2891 | 3031 | 3186 | 3310 | 3534 | 3782 | 3976 | 4100 | 4170 | 4426 | 4782 | 5557 |
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