So I have 20s on low pros... The tires state the Max pressure to be at 49PSI. On a Gen2 sedan what would you recommend to keep it at for best spirited daily driving?

Thanks in advance

 

i have mine around 35-36 psi and they ride pretty good, some even keep around 40 and like it but that was a bit too much for me as a daily

 

Same here, 36psi.

 

Mine are at 35-36 when cool.

 

+1

35 PSI or so should be just fine.

 

If I went to 40PSI or slightly above would it have any effect on anything? tire wear, MPG, etc...

 

Yes, tire wear and MPG will be affected by your tire pressure. I personally wouldn't go higher than 40PSI though.

 

I have 20"z and low pro's as well...i was told by more then one shop to run them between 40/45 lbs!! And not to run them at the standard 35lbs. They said the ride may obviously be stiffer but longer and more even tire wear!!!

 

P.S. reason being is if pressure is to low sidewalls start to crack!! All four of my tires cracked and had to trash them, first tire shop didnt give me a heads up and i destroyed my tires....1,200 dollar yoko. Advan sport tires!!! What a waste....

 

If your alignment is within spec and you have around 35-40PSI your tires should wear just fine.

 

^like he said make sure your suspension is in specs besides that 36 cold is just fine cause when you drive a few miles the tires gain 2-3psi as they heat up... iv ran 36 without any problems or premature tire issues having just gotten my second set. But up to 40 is fine if you dont mind the stiffer ride but above that is just too much IMHO.

 

I'm surprised nobody even asked.

What's the load rating on your tires? 36psi has different effects on handling as well as load capacity across differently rated tires.

Case in point, my aftermarket 18s can go down as low as 30psi and cover the OEM load specifications required by Infiniti at 33psi (oem tires.)

Kool also makes a very good point, driving will increase that pressure by as much as 5psi (dep on conditions), making the ride stiffer as you go along.

Another thing to consider, if you're doing mostly city driving, use slightly higher pressures than when you're doing mostly freeway driving. It's to do with how the contact patch extends outwards at higher speed. Too high a pressure + high speed driving will give you better fuel economy at the expense of a rougher ride and middle-tread wear.

If your camber is on spec, a decent way of "eye-ing" your pressure vs. wear is to briefly drive on dusty roads, then park. It'll show on your tread where most of the contact is being made. Too much in the middle, not enough on the shoulders means you're overinflated.

 

I had mine at 35 and increased to 40. I personally like the ride a lot better

 

WIth my 18's I keep them at 34.5... I personally think 40 as stated by others is pushing it.

 

IMO the 18 can have a lower pressure. W/20's and lower profiles they need 2 help protect the rims from pot hole.with a higher PSI. I would not do over 40 though