plat27265

As per request by a posted in another thread and for the sake of those who can't find the time to read the manual, the following information comes from the B9 A4 Owners Manual, Page 328:

oesman

Thanks for posting that up. I'm sure it's gonna help people out!

Also it's in the door jamb too, a sticker there will indicate pressure for the wheels/tires that your car came with. I was shocked to find my car was delivered with 49 psi in each tire. I asked the sales rep why that was (he was texting me to follow up) and he was like "they put in what the tire says". LOL, it does not say 49.

Really the easiest thing to do for anyone that doesn't know what they're doing is to go by the door jamb.

Dave W

As soon as I discovered this in the manual a while back I dropped my pressures down from the door sticker (maximum load) recommendation. Makes a noticeable difference in ride quality, especially with the sport suspension.

Dave

Arkive

How does higher/lower pressures affect tire wear, especially cornering at speed? I would think higher pressure would give a stiffer ride but longer tire life.

Q5 Bob

If the differences aren't too extreme, the effect on tire wear would be relatively small over the life of the tires.

munsabin

That's so good to know. What PSI did you drop it down to?

Flyin' SV

Higher pressures will cause uneven wear, just different kinds. Particularly in the wide, low-profile tires on these cars, over-inflation can lead to excessive wear in the middle part of the tread. Under-inflation can lead to over-heating, which leads to tire failure. Under-inflation is also not going to do your rims any favors when you inevitably hit a pothole.

I don't mean to sound d*ckish, but correctly inflating tires is something that's never given me trouble. Recommended pressures have been in the door jamb on every vehicle I've ever driven, and it's something I check/maintain regularly, particularly before a long trip or when the temperature drops.

I have a compressor in the garage, and I bought this (https://www.griotsgarage.com/product...ortby=ourPicks) about 15 years ago. It reads 2 psi low, according to my TPMS, so I inflate to 2 psi over and I'm good to go. With 8 vehicle tires, 8 trailer tires, and more bicycle tires than I can count, it's the only way to go - you'll never miss trying to find a service station with a working air hose, and enough quarters to get the job done.

Dave W

I have the 18" All Season Pirellis, so I go 35 psi in the front and 32 psi rear.

Dave

Glisse

Yes, but the whole point here from Plat's useful post is that the pressures on the door jamb are NOT RECOMMENDED for most people most of the time. The correct pressure, which is Normal load, is in the Manual.

Audi are eking out an extra 0.5mpg or so on certification at the expense of their owners suffering a lousy ride, compromised handling, and excessive rear tyre wear by putting Maximum load rather than Normal load numbers on the door jamb. They do not do it in other markets from what I have seen. They have both Normal and Maximum on the door jamb stickers elsewhere.

adg44

You can thank the Ford explorer and firestone tires for the door jambs all now showing max load for the tires...