What tire pressure should I run with the stock 17" rims?

The label on the door gives the info for the 18"

Is it the same for front and back?

 

The label on my '05 states 32 psi for both front and back for 17" rims.

 

Thanks!!

 

32-34

 

Whoa, they changed it for the '05's? The label on my coupe states 35psi for both front and back (17's). Should be the same for 18's. Why would the 2005 ZR have a lower recommended tire pressure?

 

The recommended pressure on my 2004.5 Roadster is also 32 PSI.

-Steven

 

My 2004.5 Roadster, with the optional 18" rims/tires, has a 35 psi recommended tire pressure according to the sticker in the door frame.

 

i got 35psi also...i actually keep it a bit higher (better mileage) if i am going to drive hard i will drop it a bit but for city driving i keep it around 37.

 

Same here.

Dezigner

 

My 2004.5 18" rims also says 32 psi. Anyone know why some stickers are saying 32 and some 35

Thanks

 

It has to do, I believe, with the feathering issue. When my '04.5 Touring Roadster at 7500 miles was diagnosed with the feathering problem (front tires only), at NNA's request the dealer dismounted and remounted my tires on the right and left rims. Both front tires were reinflated to 35 psi to compensate for the side wear caused by the feathering. The rear tires remained at 32 psi.

Therefore, I suspect the reason for the increased pressure requirement is to force the primary wear on the center of the tires and to reduce the wear on the extreme sides of the tread common to feathering. That;s my guess anyway.

 

Hmmmm Never thought about that.

 

It could also have something to do with the redesign of the tire too. From what I understand, the inflation pressure has a lot to do with the load carrying capacity.

When you change tire brands and sizes, you're supposed to adjust the tire pressure according to the load rating of the tire. That's what that 91y or 97v (I can't remember from the top of my head) code next to the tire size is supposed to mean. I went through a "tire pressure chart" and ended up going 40psi up front and 37psi in the rear to make my load capacity equivalent to the OEM's 35psi.

I don't know why tire manufacturers and resellers don't make that known.

So, perhaps the 32psi for the roadster is based on a tire that is slightly different from my OEM tires.