Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-18 | 235/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.65 (702.2) | 28.18 (715.7) | 0.53 (13.5) 1.9% |
| Width inches (mm) | 9.65 (245) | 9.25 (235) | -0.39 (-10) -4.1% |
| Circum. inches (mm) | 86.85 (2206.03) | 88.52 (2248.44) | 1.67 (42.41) 1.9% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 5.09 (129.25) | 0.27 (6.75) 5.5% |
| Revolutions per mile (km) | 729.52 (453.3) | 715.76 (444.75) | -13.76 (-8.55) -1.9% |
235/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.38 mph (32.81 km/h) |
| 25 mph (40.23 km/h) | 25.48 mph (41.01 km/h) |
| 30 mph (48.28 km/h) | 30.58 mph (49.21 km/h) |
| 35 mph (56.33 km/h) | 35.67 mph (57.41 km/h) |
| 40 mph (64.37 km/h) | 40.77 mph (65.61 km/h) |
| 45 mph (72.42 km/h) | 45.87 mph (73.81 km/h) |
| 50 mph (80.47 km/h) | 50.96 mph (82.01 km/h) |
| 55 mph (88.51 km/h) | 56.06 mph (90.22 km/h) |
| 60 mph (96.56 km/h) | 61.15 mph (98.42 km/h) |
| 65 mph (104.61 km/h) | 66.25 mph (106.62 km/h) |
| 70 mph (112.65 km/h) | 71.35 mph (114.82 km/h) |
| 75 mph (120.7 km/h) | 76.44 mph (123.02 km/h) |
| 80 mph (128.75 km/h) | 81.54 mph (131.22 km/h) |
| 85 mph (136.79 km/h) | 86.63 mph (139.42 km/h) |
| 90 mph (144.84 km/h) | 91.73 mph (147.63 km/h) |
| 95 mph (152.89 km/h) | 96.83 mph (155.83 km/h) |
| 100 mph (160.93 km/h) | 101.92 mph (164.03 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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