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On winter tires the thread needs to flex a bit to loosen up the snow.
40 PSI in mine works fine with me, but 44 PSI in yours may be too much.
It depends on the tire type, vehicle type, tire wear and of course weather and road conditions.
The rule of thumb is that there is no rule of thumb.
You have to adapt to the situation and be aware of changing conditions and the effect that may have.
Test the grip when you can safely do so, then you know where the limit is and stay well away from that limit when you need to stay on track.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gigameter or 0.13 Megamile.
For confirmation go to people just like you.
For education go to people unlike yourself.
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