I have the 50/18 tires on mine and a friend has 45 on his and they looks way better. His sits lower while mine looks a little raised. I'm guessing cause I don't have the ground effects. It really comes down to between these two sizes.

Also i think running 50 series give you a worst difference in tire diameter thann 45.

 

It depends on your width. If you are running a 50, you need a 235 width. If you are running a 45 you need a 245 width.

 

I cannot run brand new 235/50/18's on my car in the rear - they rub the strut tower. My fronts can be brand new, so that's why I am deciding to run new on front and cycle to back - sure my fuel mileage may suffer a bit from having more worn tires on the back, but I don't know for sure putting struts from an 07 SS will work with my existing springs and I don't want to buy springs and struts from the 06-07 SS just for rear tires to fit.

 

Get some spring spacers from autozone. You will have to jack the car up to place them between the rear springs to lift the car a little bit.

 

that'll push it up way to high and it won't effect where the strut plate sits.

 

Are you experiencing any rubbing issues with the 245/45/18s?

I want to put 06-07 SS 18"ers on my 2000. Am I safer with the rub issues going 235/45/17?

 

Just to give you guys the straight answer. You must remember that the RED CH that you see while sitting is NOT the gap while driving... the tire moves on its side walls while driving, sort of like a mini shock absorber. Also as you go faster the circumference becomes larger and under hard braking the tire actually elongates to push the tread more towards the top. The result is wearing the inner 1"of thread off the tire an YES sometimes just simply ripping that whole inner 1" completely in just seconds. (been there, really)


So if you are to go with 18" and 235`s or 245`s DO install the 06+ struts for 18" W and the springs for the same as the springs are different and will give you the proper ride height. At rockauto AC Delco springs PN/45H3138 for under a hundred bucks for a set.


PS. People can and do find a hundred ways and excuses to do something the wrong way but they seldom follow the right way to do something correct!

 

could I get 06 ss springs and struts for both rear and front to install on my 2000 ss. i want to do my suspension over and i am installing 06 ss wheels tire size 245/45/18 on my 2000 ss

 

They should be same part numbers for most designs, however putting the ss wheels doesn't depend on height of strut, but the width. You would simply need a thinner tire instead of higher struts/springs if that's what your asking

 

To clarify a few things:
The tire size (235 / 45, 235 /50) means that the sidewall height is 45% or 50% of the thread width.
The front struts and springs are the same for all years, except the options of FE2, FE3 and FE4 are available.
The rear struts are different for any application using the 18" wheels. It / they have a higher spring perch than the regular 16 / 17" wheel applications, therefore a shorter spring is also used in the 18" applications.