PYRO1

I got my BFG KDW-II's last night, great tires. Nice to get rid of the run flats. Now how much air pressure are y'all running? I started out with 35 PSI cold.

Thanks

army2000

I still say go by what the manufacturer reccommends for the car, and that's 30 PSI. Just my opinion.

0EG@EnglandGreen

I run 30psi all round with my non-runflats.

blacksedan87

I follow the placard on the door - 30 psi cold. Whether or not the tires are run flats really makes no difference.

RTSVET

Wisdom

I'm using Nitto 555's on an F55 equipped '04. Running at 30 psi is too spongy. Running at 32 psi seems better. But I'll probably increase it soon to 33 psi cold. The runflats were much noisier, but the ride and cornering was firmer. The Nitto's are still OK for me - I've just got to find that setting...

- Wisdom

BobbyG

Look on the tire, it's manufacture dependent.

Bob

DeeGee

I have Michelin Pilot Sport A/S ZPs. The Michelin advice is to run tires at the vehicle manufacturer's recommended pressure

Over or under inflation puts less tread on the road and leads to excessive wear across the tire.

For the Vert thats 30 psi cold.

BiggieBoy

w/ Bobby. Just look on the tire sidewall, it'll tell ya.

b98

bekdad

I disagree w/you and Bobby. The max tire pressure is on the tire sidewall. The manufacturer's recommendation - for his car - is stamped inside the door.

Vetteman Jack

I've always tried to keep mine at what is said on the door. You may start with that and see if you notice any unusual wear. If so, adjust the pressure.

ZO6vettepilot

That's usually the MAX pressure, the vehicle owner's manual has the correct pressures. The manual is a good place to start, but you may want to adjust up or down a couple of PSI depending on the ride and the observed tire wear. The OEM tires were tested and approved for certain pressures, but because of different tire casing characteristics, what works for OEM tires may not be exactly right for another brand or series. Also, tire width vs rim width comes into play if you have upsized to a wider tire than OEM, or if one should use a wider rim than OEM, but use the OEM sized tires, tire pressures will make a big difference in handling feel and tire wear. It sounds like you are experiencing a more flexible sidewall than the OEM runflats, (which is reasonable, stiff sidewalls are the heart of the runflat design). So you may have to run higher pressures than what the owner's manual calls for. If I recall correctly, 30 PSI is what the C5 Corvette manuals call for on all three models. I would think 32 - 35 should make the tire feel firmer, but you may see increased center tire tread wear, and of course a noticably rougher riding tire.

jrose7004

I run 30 psi cold on mine!

ebubman

om says 30bub

DAN01

30 psi all the way around

edensknight

Groucho

I go by whats on the tire..Think about it...You can put any tire on a car..the placard is generic..
Go by what the tire says!

BTW Firestone RF's I run 33 or 34...