[Biturbos4] 18" wheel tire pressure

Wilson Northrup northrup at crazybug.com
Sat Apr 21 14:49:07 EDT 2007

depends on your desires.
road conditions here are sometimes not the best, so i inflate a bit more. 
In addition the sidewall composition plays a part, so depending on how 
much deflection (which should be less on the 18's) balanced with a 
reduction in footprint (too much pressure will reduce your contact patch 
signifigantly) you shoud pick a place.

fwiw, i up'd about 2psi from stock and run 4psi lower in the rear as 
compared to the front, assuming 1-2 occupants.  I up the rear a bit when i 
do a run to the airport to pick up family/friends/luggage.

IIRC, the washington roads weren't too bad, but not the best either.  That 
combined with any potential alaskan run you might want to do - i'd suggest 
a few PSI over stock to keep the rims round :)

btw, is it possible to drive the S4 all the way to the artic circle on 
paved roads?  maybe i'll try it.


On Sat, 21 Apr 2007, Steve Munk wrote:

> Ok here's a dumb question for ya'll. I just got some 18" wheels with
> 225/40 tires for my S4 . What's the correct tire pressure? Same as
> the stock 17's or higher?
> Thanks,
> Steve
> --
> Steve Munk                           http://people.arsc.edu/~munk/S4
> HPC Systems Analyst                  '01 Audi S4 biturbo, silver 6-speed
> Arctic Region Supercomputing Center  '01 Audi A6 2.7T, gold 6-speed
> University of Alaska Fairbanks       mailto:fxstm at uaf.edu
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