I have a 05 cobalt ss/sc. I have the stock wheels, and my tires are 215/45/18, so are my wheels a 18x8.0 or 18.5.0 I am looking at a new pair of wheels that are 18x8.0, but I am not going to buy them if my tires I have now will not fit on the new wheels that I want.

 

215's will be a bit stretched on an 18x8 wheel. IIRC stock SS/SC wheels are 18x7

 

so what size tires could I have with 18x8 wheels?

 

i think 235 eh? maybe 240? not 100% definite though

 

235 is good for an 8" wide wheel.

 

i have 245/40 on a 18X8 and on stances and the bitch rubs.... gonna stretch it when i get tires next and get 225s

 

Yeah at least a 235 on an 8 incher...245 might be a bit better for some extra traction/wheel + curb protection...but depending on your suspension setup up you may not want to go that wide.

 

suspension and all is stock

 

215/45 will be fine on an 8 inch wide wheel

 

how about 245 on 18x8.5 with pedders? Think it will rub?