what kind of wheels do you have ?

 

See above

 

Below are my wheel specs.

Front 19x8.5" +48mm offset with a 245/35R19
Rear 19x11.0" +40mm offset with a 295/30R19

Later, Steve

 

Here are some pics of 235/35/19 on 19x9 and 305/30/19 on 19x12 wheels. Tires are Porsche N1 spec Bridgestone RE050A. The Bridgstone 305s run about half inch wider than comparable 305 PSS or PS2s. The 305 Michelins will look a little more stretched. I am running camber shims on my front LCAs giving an effective offset of ET39 in the front and in the rear I have ET44.


RE050A angle view by pwdrhound1, on Flickr



RE050A side view by pwdrhound1, on Flickr



RE050A rear by pwdrhound1, on Flickr



RE050A rear view by pwdrhound1, on Flickr


RE050A front by pwdrhound1, on Flickr

 

They fit no problem I had 12 inch rears wit a 315 30 19 no problems.

 

Thanks gents!

 

I assume you're rwd with the front/rear diameter difference?

Later, Steve

 

Yes, RWD w/ Guard LSD

 

So for AWD I need to go 235/40 to keep the front to rear ratio lower (assuming I do the PSS 305/30)?

 

Yes, but keep in mind that it may rub at sharp steering angles (like in a parking lot).

Later, Steve

 

That's the catch. You need the same front to rear tire diameters, ideally you want the fronts a touch larger than the rear to get static torque transfer to the front. However, the 305/30/19 is right at 26.3" but there is no way to fit a 26.3" front tire without rubbing unless you relocate the front radiators. The best solution is to dump the FWD and spend $3k on a good LSD.

 

This is why I went with a 295/30R19 instead of a 305/30R19. It allowed me to run a 245/35R19 on the front. Not perfect, but functional.

Later, Steve

 

Steve - but you can run the 295 rear b/c you have an 11" rear correct? Not 12"?

 

I have never rubbed in the front with 235/40/19's either on stock springs or lowered an inch.

 

Correct, your 12" wheel would be inappropriate for a 295.

Later, Steve