BluLytNin

I went outside, jacked up the car, took the wheels off and examined each sidewall under a microscope and this is what was written on them:
Radial X
225/45 ZR 17 <B>91Y</B>
B TUBELESS
Pilot SPORT /Z &lt;-- Flag

eharleq

Weight limit and speed class.

BluLytNin

...why would a lighter and slightly slower car (BMW 330i vs. Audi S4) get a better (IMO) handling tire.

If it were Audi's decision to do this, they held the bong too long when doing so.

esfor

previous S4s have come with P6000s and RE040s which are also cheaper.

Luke@tirerack

If you are comparing the 330I tires to your S4 tires I hope you are not comparing the rear tires because the BMW has a wider rear tire and the tread pattern is a little more spread out. I have spoke to several people and there is not an Audi specific Pilot Sport, also there is not a BMW specific Pilot Sport but the BMW does use a different Pilot Sport. The BMW model does not have a 91Y service description. The Audi tire is made in Germany and the BMW tire is made in France. I am having 1 of each of these tire brought to my desk so that can see the differnce and identify the differences. I will let you know what I find. Basically this is alot of typing to say "I do not know but, I will find out"

Luke

Ferris TMK

but not of HTML can you add &lt;/A&gt; to your sig it's killing me bro...

RENN 951

what load and speed are they good for?? ;-)

Ferris TMK

As per the manufacture they are only good for one load..

RENN 951

LOL!!