What??? Only 2 wheels?
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Originally Posted by
CACycling
Putting the gauge on the valve allows air from the tire to enter the gauge. On high pressure/low volumne tires this can effect the pressure slightly so if it was 100 psi before putting the gauge on it will be slightly less afterwards.
Of course a good test for this is to pump up the tire, check it with a gauge, then check it again with the same gauge.
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