Tire pressure.

Mikead40 said:
If it comes off evenly at 28, I would stay at 28. You can try adding some to go to 29 or 30, but in my opinion you're kind of splitting hairs.
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I dropped them down to 30, I haven't had the time to do a chaulk test yet, but looking at the road dirt on the tread it looks a lot better. Almost out to the side walls. The test will let me know for sure. It does feel Much better thou.
Thanks for the help
 
Just to complicate things...the correct pressure may change over the life of a tire. When new the sidewalls are very stiff and the lugs move around more because of their depth. After the tire has been broken in (aired down and wheeled on) a few times the sidewall can become less stiff. Also, as the tread wears down it will squirm less. Not say this will necessarily change the optimal pressure much, but it wouldn't hurt to do the chalk test maybe once a year as the tire ages.
 
This is ridiculously helpful thx to all who contributed. This makes so much more sense than asking the kid who just gets payed to mount /balance my tires @ the shop.
 
Just my 2 cents but I would do the chalk test when the tires are at driving temps.

As you drive the tires heat up and the pressures rise. If you do the chalk test when the tires are cold, the pressures will rise after driving them a bit which will make the chalk test that you did useless.

If you set them at driving temps then yes when they are cold the pressure will be a little low but as you drive the tires pressure will rise to the same pressure you set them at based on your chalk test. They will then remain at that pressure the entire time you are driving.
 
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