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To those running 18's

I put in 5 PSI under tire spec. Right now I run 45 PSI and check it every other weekend. Once it gets around 35 PSI I fill it up to 45 PSI again.

Check out you tire's side wall, it should have its recommend tire pressure somewhere on it.
 
Check out you tire's side wall, it should have its recommend tire pressure somewhere on it.
That is not a recommended pressure. That is the maximum pressure.
Anyways, the 'correct' pressure for aftermarket wheels/tires is gonna be different for everyone on here because of different suspensions, different tires, and different driving styles. Just watch how the tires wear. I see a lotta people run too much air, especially with aftermarket wheels and wear the center tread out quick.
 
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