nocondorfx

gas cap says 32psi, but the new tires coming can go up to 51psi. Where should they be inflated to??

lskolnick(original)

I have always been told to use the inflation pressure printed on the car...

UrSoccer_mobile®

When I got my wheels and tires, I checked on them and they filled it up to about 51 or so. I talked to tire.com and they said to bring it down.

Don@STaSIS

Howdy! It depends on what type of tires/conditions/preferences are. The stock recommendations are for stock sized tires, all season most likely. When switching to summer only tires in a plus size application you will want higher than manufacturers recommendation. I generally run my tires in the upper range of the tire's specific inflation range. I run my Nokian NRW's at 38psi or so, the Kumho 712's at 42psi or so.

Cheers,

UrSoccer_mobile®

Why so high on Kumho? Is that what Kumho reccomends?

Nervikterklieb

the number on the tire is just the maximum the tire can take, not whatit should be. my snows say 75psi, but i'm certainly not going to uput that in them. it all depends on the weight of your car. hevaier car means more pressure. it's just to insure that the whole of the tread stay on the ground. do what the manufacturer syas, it ha snothing to do with tire size, as air pressur eis all relative anyway.

Don@STaSIS

Howdy! Read this:

<a href="http://www.sportcompactcarweb.com/tech/0208scc_tires/">http://www.sportcompactcarweb.com/tech/0208scc_tires</a>

It's got a good write up on what to do with tire pressures. When you go plus size the pressure should go up, though it's all to taste, but don't hang around the upper limit of the tire or go over it.

I go with the upper range because I prefer crisp steering and on the street I do not need absolutely maximum traction, a lower pressure can help give a bit more grip, but does give a slightly more sluggish steering response. I know many are running low 40's for autox'ing in these cars using 16/17/18" setups.

Try a pair of 16" or 17" at 32psi and you probably will not like it. If you are sticking with a stock size then stay around the stock psi.

Cheers,

Merkin

too much inflation (40+) can cause unever tread wear.

squidix9

Take an unmounted tire and drop it, the higher the bounce the softer the sidewall. Kumho's have a particularly soft sidewall. You'll notice this less as you get into the lower profiles, but it shows up pretty well in more or less stock sizes. If you take one of my Pirelli K65's and drop it, all you get is a loud "thud". and no bounce. Now this is on the extreme other end of the spectrum, but you get the idea. With a soft sidewall, you need a slightly higher pressure to keep them up.

With Quattro, you are looking for something with a pretty stiff sidewall. That said, for cold weather driving, a softer sidewall and also compound isn't a bad idea. We ended up running Yokahama's up in Canada a couple of weeks ago, and they seemd to be the best bet. We had Michelin's/Kumho's/Blizzak's(tractionized), and the Yokahama's, and they were the best. Looking at the top finsihers, there were a lot of Yokahama's being used.<ul><li><a href="http://65.95.205.64/fourstar.nsf">Tires</a></li></ul>

QCRAZY

At whatever pressure you prefer that is less than 51psi!!