TPMS said i had a low tire so i checked the door sill to see the recommended pressure was. It says 32 but three of my tires read 38 and one was 18.

What are all you runnin'

EDIT: I did the readings while tires were cold

 

Run what it says on the door unless you are racing.

 

Yep.

 

On the 18's I like 38/35 F/R.

On the 19 (Shorter Sidewall) I would try 35/32 F/R.

The reason I run a little more pressure at the front is improved turn in. Even the rear was a touch soft at 32 psi. All pressures cold in the morning of course.

 

For Best Traction Off the Line, Straight Line of Course, 27PSI Rear on the 255/18's...