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How much air should I put in my tires?
The wheel shop set my air to 40/36 and I've been running that set up for about 8 months now and it's fine.
However, I am going to LA-LV this weekend, traveling with 4 people in my car and some luggage. Should I change my pressure? I am planning to hit 100mph+ once in a while.
I drove the other night on the freeway with only 2 in my car and 2 minutes after I got out of the freeway I checked my pressure and it was at 45psi front. So if I keep that 40psi set up, will it go up more than 45 if I have 4 in the car + LA-LV in the afternoon will be hot?

I appreciate any input!
 

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40 psi all round sounds right to me, thats what I run, but for 225/35 19's
 
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