This week I'm rolling to Vegas in our long-term 2009 Audi S5 again, this time to attend the
CTIA Wireless conference.
I decided to check the tire pressures before I went. The tires are high-po Summers sized 235/35ZR19 96Y all-around.
I was surprised to see that the fronts want 39 psi! That's the highest I've seen for a passenger car.
Do you know of another car that takes that much air?
Another surprise was the Mercury content on the S5, which I think would be common to many vehicles. Who knew?
Catch the CTIA coverage this week on Straightline.
Albert Austria, Senior Engineer @ 19,200 miles

p_s_chang1 says:
04:12 PM, 03/22/10
My 2010 Mazdaspeed3 takes 35/34psi front/rear for its stock summer tires, but the owner's manual says to add 4psi for winter tires. So to answer your first question, yes, the '10 MS3 takes 39/38psi for winter tires. Why Mazda calls for an extra 4psi for winter tires, I dunno.
umsneeze says:
04:50 PM, 03/22/10
My Porsche 911 requires 37/44. That's with the smaller 18s.
texases says:
05:42 PM, 03/22/10
Question on another site about a Passat wagon, sticker (supposedly) says 36 psi front, 44 psi rear. I've never heard of higher...
boxermike says:
06:01 PM, 03/22/10
Fat cars with bad balance have high pressure. See Bentley Continental Supersport: 49 psi front.
clarkma5 says:
06:13 PM, 03/22/10
My MkIV GTI takes 32 front/42 rear on the factory 17s.
charlesncharge says:
06:14 PM, 03/22/10
Wrong - the tires are actually: 255/35R-19!
bimmerjay says:
08:14 PM, 03/22/10
I think the S5 should be awarded the first annual Inside Line 'Most Times to Vegas' trophy.
cr_driver says:
08:27 PM, 03/22/10
boxermike says:
06:01 PM, 03/22/10
"Fat cars with bad balance have high pressure. See Bentley Continental Supersport: 49 psi front."
Word.
buckeye96 says:
05:14 AM, 03/23/10
My buddies Volvo S40R is in the high 40's
audisport says:
06:39 AM, 03/23/10
The S5 might be fat, but it's also phat! JUST KIDDING!!!
jeepsrt says:
08:42 AM, 03/23/10
My Jeep has that same warning about mercury containing devices.
itm1221 says:
01:57 PM, 03/23/10
is anyone else sick of the Edmund's InsideLine not updating these blogs for days its very disappointing they used to update all the time, now it is rare to see an update even every three days apart (or more like every 2weeks) I WISH THEY WOULD UPDATE THEIR BLOGS MORE even if its about something simple like the exhaust smell or something i miss reading them every other day if not every day.
mrjost55 says:
09:21 PM, 03/23/10
My IS250 suggests 35F/38R
desiccant says:
09:44 PM, 03/23/10
2004 S4: 39 psi front, 35 psi rear on stock 235/40-18 tires.
wjtinatl says:
02:47 PM, 03/24/10
Don't get too excited about the Mercury warning. My rental in Minneapolis last week was a stripped (no options, according to the window sticker in the cargo area) Grand Cherokee and it had the Mercury warning label in the door jamb.