Hi guys,

I have on my TT 225 wheels 235/35 with 19 inch rims and I was wondering what is the pressure that my tyres should have?

Should the pressure on the front be different from the one on the rear?

Thanks

I have the same size tyres.. I used to put 40psi in mine, but now put 38psi all-round as I thought 40psi was too much. Anyone else with ideas?

Somewhere around the mid to upper 30's is good, you can adjust front or rear higher/lower to tweak how the car handles.

so far I was putting 35psi front and 32 rear, but i thought it wasn't enough.

That's why I want opinions... but if you say (justinclarke) that 38 feels good I will go with it.

If the pressure is not the same in both rear and front how does the behavior of the car change?

a highly inflated/over inflated tire is going to be rigid, and so its contact patch, or footprint on the ground, isn't going to be as large, or change much, a softer tire can contour to the road more, providing more grip. Too soft a tire lets the sidewall roll though, and your steering will be sluggish/unresponsive.

http://www.tirerack.com/tires/tirete...e.jsp?techid=1

I have an impossible time finding the tech articles on tirerack w/o doing a google search to get there, but they DO have some decent tech articles to at least get you the basics. Read up, it'll make you smart. ; )

i work in a tire shop, 32-35 is the normal psi. if you over inflate it, you will eat up the middle rubber, underinflated and the sides will go, just the right air pressure means even wear, unless you have alignment problems