Quote:
Originally Posted by MightyMouseTech
The contact patch will be the exact same size if you are running a 225, 245 or 275, if used at the same pressure.
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However, all else being equal, the 'optimal' pressure will typically be lower on the 275 than the 245, and lower on the 245 than the 225. Thus when set up properly, the wider tire would have a larger contact patch, and ultimately more grip than the same compound, construction, and diameter of narrower tire.