I haven't had my wheels on for too long, and driven with them for even less time. I don't have TPMS on my wheels either.



Question is, what do you guys do as far as tire pressure is concerned?

Do you still go with factory specs even though you have lower profile tires?

Is your tire pressure lower/higher for any specific reason?

I could probably look this one up, but do you change your tire pressure according to climate/location? Why or why not?



I'm sure I'll think some other specific questions, but I'd like to get a general consensus of what everyone is doing to prolong their tread life besides slapping on a camber kit.

 

I always have gone by the tire specs and not the manufacturer, but thats mainly because the tires on my truck are larger. For the G, since my next tires are going to be different then OEM I will go by the tire specs as well on those.

 

well i know for when you stretch tires you need a higher psi, other than that if the specs are not THAT aggressive I would go with oem psi

 

isn't the general rule of thumb to go up 2 lbs of pressure for every inch bigger in wheel size over OEM?

so, for the stock 17s manufacterer recommended is like 32; for 19s should be around 36 psi. i keep mine at around 38.

 

my specs are

19x9.5 with a 245/35 tire
19x10.5 with a 275/35 tire

toyo t1r tires

with stance coilovers at max stiffness .. i run 36 psi all around .. hit crap all the time .. no bends, no cracks, no sidewall bubbles ***knock on wood***

i have no pressure sensors, so i check them EVERY two weeks .. i wash my car every week, so when i dress my tires i will notice if one tire is low (same thing with driving it, i will know if a tire is low, cause the ride gets a lil softer)

always inflate your tires when they are COLD

 

great info!!! keep it coming!

 

i run 19x9.5 and 19x10.5 with 255/35F and 285/35R Nitto Invo tires, I run exactly 35PSI I dont do any type of spirited driving. I drive casual and chill

 

+1 I run 35-36 PSI on my tires. I dont have the TPMS so just check once every few weeks.

 

I run 35-37 PSI so far so good. I have had my VOlks for 2 months now.

 

Read the tire... its tells you

 

tire tells you MAX psi

 

just because the tire tells you the max allowed PSI doesn't mean you should run that...

different applications require different PSI, which is why I was asking about this particular circumstance

 

General rule is 75% of the max pressure of the tire. The psi on the vehicle is for performance and comfort compromise. If you want max fuel economy, you can go with 90% max tire pressure. I run 39 psi on my stock size (235/45/18) Yokohama's (51 psi max).

Here is a formula from Modified magazine: http://www.modified.com/tech/0208scc...ide/index.html

Vehicle weight/100
add 2 psi all around
add 2 psi to heavy end (front of the G)
G=3500 lbs (roughly)

3500/100=35
35+2=37 rear
37+2=39 front