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[nav1111]

Hi Guys,

Just after some advice, what's the recommended tire pressure psi for non run flats on a 335d?

[Tom K.]

Start with the recommended pressures found on the door jamb sticker for OEM RFTs in the size you are using. If you find the resultant handling feel to be a bit too soft, then add about 3 psi - but do not exceed the maximum cold pressure printed on the tire.

Tom

[cdgatti]

I have had good luck going 4 psi above the "100 mph" pressure suggested for your car. You can find this on the door (yellow sticker) or in the manual.

[chromisdesigns]

Try 38 psi all around and see how you like that. It's worked for me for a while now. I used to run the same on my E36 M3 with good results, too.

Factory pressures are definitely too low for "real" tires, unless you like wallowing around on them like a hog in mud. They are BMW's pathetic attempt to moderate the horrible OEM ride with runflats.

[nav1111]

I'm running with 41 psi front and 46 on the back. You think that's fine?

[chromisdesigns]

Originally Posted by nav1111

I'm running with 41 psi front and 46 on the back. You think that's fine?

Seems a bit high to me -- I'd expect your tires to show excess wear in the middle at those pressures. How's the handling?

Maybe running max load, I don't know, still might be a bit much...

[sathoro]

Originally Posted by nav1111

I'm running with 41 psi front and 46 on the back. You think that's fine?

Damn. Seems a little high

[nav1111]

I'm running that at full load as suggested on the psi indicator sticker. I've been told to run non flats slightly higher? Ok so 38 psi should be fine then? I've noticed the steering is a lot lighter since the change.

[jcarv20s]

I run 40 all around.

[chromisdesigns]

Originally Posted by nav1111

I'm running that at full load as suggested on the psi indicator sticker. I've been told to run non flats slightly higher? Ok so 38 psi should be fine then? I've noticed the steering is a lot lighter since the change.

For full passenger load + bags, that's fine then. I run mine higher on loaded trips, too. Normally, with just the two of us and light luggage, I'll run 38 all around.

Yep, steering response is much better with non runflats at the higher pressures.

[Vreimann]

Originally Posted by nav1111

I'm running that at full load as suggested on the psi indicator sticker. I've been told to run non flats slightly higher? Ok so 38 psi should be fine then? I've noticed the steering is a lot lighter since the change.

There is a little arrow on the side of the PSS which you should just barely be able to scrub on good cornering. Mark some chalk and go for a drive and see where you scrub. I've found the tires for city driving are nice at 35-36 front and 39-41 back. Any higher is adjusted for long hauling highway driving.

Your temperature ranges may result different pressures.

[sbce90]

I normally run around 37 or 38 psi, if its hot then 40.

[jzy11]

I run 33 / 41 as per door jamb sticker

Seems like jamb stickers recommend different tire pressures for different countries