So i got a 2004 chevy silverado z71, and the stock tires were 265/70 r17, according to the sticker in the door jamb. Stock tire pressure is 35 psi front and back. But the tires it has now is 275/55 r20 with aftermarket rims. should i use the stock tire pressure, or a different psi?
Anonymous
Same as the weight of the vehicle has not changed. You have lowered the air cushion height of the tire so it rides more like a go cart. The walls of the tires are all going to say 32 whether it be a 17", a 14", a 12", a wheelbarrow tire ( so the 32 just means do not inflate much past this number. It is a tire number that is in the mold of all tires, but there is a difference in weight from say a HUMMER and a SMART CAR and yet the tires have 32 psi on them. Being the cars are different weights check in between the door opening to see what the sticker recommends for your vehicle. Manufacturers of the car know what their vehicles weigh.
thebax2006
Start with the 35 PSI recommended. If you want a firmer ride use 37 PSI.
Ron
You should use whatever the professional that installed those tires recommends
Anonymous
I'd go with 38 PSI
Anton
You want the correct PSI in every tire? You need to do your homework.
Weigh how much weight every tire is carrying.
You talk to the tire manufacturer to find what PSI is required to carry the weight.