i noticed alot of guys running 28x10.50x15s are getting the stiff side walls wouldnt one want soft side walls??
will the stiff side wall make the car hook better??

 

The stiff sidewalls work better on a M6 car.

 

I dont mean to hijack your thread, but how big of a difference am I going to see with a normal sidewall. The reason I ask is because I have a set of 28x11.5 ET Drags with normal sidewalls that I plan on using this year and my car is an M6.

 

In my experience stiffer sidewall for heavier cars work better.

 

well my car is 3600 pounds and its a A3 th400~ so should i get soft then?

 

No, you should get the stiffer sidewall. 3600 is HEAVY and the stiffer sidewall will hook and the car will react quicker. My car last season was over 3400#'s and I used a stiff sidewall. If you need more info call MT or any of the big tire manufacturers and the tech guys can give you more info. In my experience they have been very helpfull.

 

3600 is FAT, your definately better off with the stiffer wall

 

the stiffer sidewall also doesn't grow quite as much, so there's less clearance issues. At your weight you'd definately be better off with the stiff sidewall tire, hell I knwo of 3300 lb 9 second 4th gen cars that are running the stiff sidewall tire with very good luck.

FWIW I'm putting a set on my car this year, I suspect that those tires along with screwing them to the rims will net me some substantial gains over the 27x11 qtp's I was running at the end of last year. I'm expecting it shoudl probably knock .2 to .3 off just with the tire change, and screwing the tires to the rims.. the qtp's were moving about 1/2 way around the rim every pass LOL.

 

qtp 27 is what i had as well...its said that its a 6 mph gain going to a 28!

 

I doubt I'll get that out of changing to the 28 inch slick.. maybe I'll be capable of another 6 mph with the added height... but to gain that much... I doubt it.