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Old 07-27-2011, 12:24 PM   #2
Join Date: Jul 2010
Location: Markham
Posts: 286
pressure fluctuates with the temperature and weather. Also altitude plays a role as well.

Generally, accuracy isn't the most important thing, As long as the two fronts are the same and rear two are the same. (and the pressures are somewhat close to specs).

You can go with a digital gauge if you want more accuracy.
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