soundmike

iTrader: (24)

Guys, i'm curious. After going aftermarket on your tires, do you still follow the tire-pressure specs as before (e.g. Nissan recommended #'s)?

Or do you follow the tire manufacturers specs?

On a similar note, to those with 18's, what PSI do you keep yours at?

Thanks.

jjs

What do you mean by tire manufacturer's spec? The max inflation they quote on websites and sidewalls? If so, this is the MAXIMUM pressure for the tire, including heating up and air expansion. It should not be used as a cold inflation pressure.

soundmike

iTrader: (24)

Yep, i didn't know that was based on all the other factors included.

So is there a rule on how much pressure i should stay at? On the OEM Potenza's i always followed what Nissan recommended - should i use the same #'s for aftermarket rubber?

Thanks

jjs

If it were my car, I would start with the 32psi and work from there. What pressure are you currently at and do you have any handling issues?

soundmike

iTrader: (24)

I haven't checked it yet but the car tracks straight and there doesn't seem to be any handling problems so far.

I'll check it out later and post back.

Thanks J

jjs

no problem!!

soundmike

iTrader: (24)

Judging from this thread, i should've just PM'd you to begin with

jjs

redstradic

i always just use the max pressure that it says on the side of tire, should you not do that?

jjs

These might be worth a read..

http://www.csaa.com/global/articlede...7C2038,00.html

http://www.ridemyown.com/articles/te...idestory.shtml

Especially the second last paragraph of this...

http://home.att.net/~pdmo/safetyseven.htm

soundmike

iTrader: (24)

Interesting reading. Thanks for the links!

Now to get myself a digital tire pressure gauge. I still have one of those pokey $2 one's from Walgreens.

jjs

My pleasure!! Most of the country doesn't really have to worry too much about 90+ degree weather, but we do.

Yeah, summer is getting REALLY old!!

BTW, you have a PM.

j2k15spd

Ok those links seem to suggest the pressure on the sidewall of the tire. My P6000s have 51 max PSI on the sidewall, Pirelli's website recomends 44 PSI and the Max says 32 PSI...Now I have no idea what pressure the tires should be at.

jjs

Actually they don't.

Ok, this might help a bit more...

http://www.tirerack.com/tires/tirete...l/pressure.htm

if in doubt, I would suggest you contact the tire manufacturer customer service line to confirm anything. make sure they take into account which vehicle you have these tires on, since the weight on each tire can vary significantly from car to car.

E55AMG2

iTrader: (4)

The proper air pressure is that where your car uses as much of the contact patch as possible, and doesnt wear onto any of the sidewall during cornering.

As for the max pressure thing, they usually say whether or not it is a cold or warm pressure. For example, I used to have a set of Energy MXV4s from Michelin. The sidewall said "44 psi Max inflation cold pressure". And I have a set of Goodyear Wrangler RS-A's on my mom's jeep that say max pressure 40psi". If it says cold, then go like 3-4 lbs lower for a cushion. If it doesnt, then keep it at like 8-10 less.