Winter tire size question for 135is

[Dackelone]

Originally Posted by MightyMouseTech

Actually not quite correct. The only thing that will change the PSI on the road is the PSI in the tire (or the weight on the tire) Changing the size of the tire will not. It will only change the shape of the contact patch. Running 40 PSI in the tires will have the same size of contact patch if you are running a 205 or a 255.

Yes, you are correct on that. I meant the shape of the contact patch. You do not want a wide cp, but a skinny cp to punch thru the snow. There is a reason why BMW recommends a 205 tire for winter.

The only car I've seen BMW recommend a 245 snow/winter tire is on, is the 5er GT with the V8tt engine.

[owen2001]

Originally Posted by 3002 Tii

You can skip it but you'll have a light on the dash the entire time. For what it's worth, assuming you're buying a wheel & tire package, the $230 isn't bad b/c you're getting free mounting & balance. If you changed your mind down the road, you'd have to spend an additional $150 for m&b.

Good points. Thanks.

[MightyMouseTech]

Originally Posted by Dackelone

Yes, you are correct on that. I meant the shape of the contact patch. You do not want a wide cp, but a skinny cp to punch thru the snow. There is a reason why BMW recommends a 205 tire for winter.

The only car I've seen BMW recommend a 245 snow/winter tire is on, is the 5er GT with the V8tt engine.

Exactly, now if only somebody would build a 195/55/17!

[Dackelone]

Originally Posted by MightyMouseTech

Exactly, now if only somebody would build a 195/55/17!

I don't think those would fit right on a 7j x 17 wheel though. ?

Thats probably why BMW sticks with a 205 tire.


Speaking of tires... have you guys seen the new Pirelli/Conti tire that has a foam pad ridding along the inside of the carcass to reduce noise. It will be used first on the Audi RS7 and RS6 cars as an OE tire.

[MightyMouseTech]

Originally Posted by Dackelone

I don't think those would fit right on a 7j x 17 wheel though. ?

Thats probably why BMW sticks with a 205 tire.

A 195/55/16 will fit on a 7.0" rim.