Jskyline

I always put 36-37 psi only when cold. Cause after 10-20 minutes drive the air will expand another 1-2 psi.

Temoz25

All 4 tiers are 225/30r/20 should all of the psi be 35

Temoz25

what's a good psi for all 225/30r/20

Sodium

Anything in the 33-40 psi range is fine, so you're fine at 35. Just don't get below 33 psi

Mesca

iTrader: (28)

Those are really skinny tires. I'd actually go higher than 35 and do 39 or 40 for more protection.

ibidu1

iTrader: (1)

Actually the proper way to determine air tire pressure is to contact, or view specs on the tires manufacture. Every tire design is different, the stickers on our vehicles is the tire psi for the oem brand tires at the oem size.

Another way is to look at the tire wear, if your getting outer edge wear then maybe tire pressure is to low, if its on the inside the psi is to high. What Jskyline mentioned is correct cold air psi and tires do expand, so its best to check them cold.