Originally Posted by andrewcarr1993
You should be able to go marginally bigger just not much bigger. Just get a more aggressive tire if that's what you're looking for. These cars can be made to handle great, now for raising them I have no idea.
While a little extra ground clearance would be appreciated, that's not the main reason for the taller tires. Potential increases in mpg (dependent upon rotational mass and torque), better "roll-over" on debris/etc, thicker stronger sidewall... Those would be some of the reasons I always put taller tires on my vehicles. The balt is tons of fun, I can only imagine how awesome these cars handle with coil overs!
You can fit a pretty big tire on a base cobalt. I have a base model which has been lowered around 2" in the front and I am running 215/45/18 tires which is the stock size for the ss/sc model. So in that regard you can fit a pretty tall 15" tire with stock suspension setup. You will just have to use a tire calculator to judge how much your speedo will be off or have the car reprogrammed. I just know that mine is off about 5 mph at 70 mph. So you could run like a 215/70/15 without a problem
Yeah there's tons of room in the wheel well, doesn't surprise me that you were able to drop it with those
215/45R18 = 25.62", 215/70/15 is 26.85", do you know this will fit or you just applied your 70 aspect ratio to the 15" tire size? That's a whole inch taller than you're tires. Do you know how much room you have between the rubber and the bottom of the strut?
Is the strut tower really that close? Never paid much attention to it... you could possibly run some spacers to push them out a little farther
Yeah it's a little over an inch above the rubber that's on there now... Don't have a precise measurement because the tires have a lot of miles/wear on them, so it could be less than that with a new tire of the same size. So in theory I can throw on a tire that's two inches taller, roughly 26.2"... But Since I've never had a suspension like this, I've always just thrown on whatever would fit in the wheel well
Basically I'm not sure what clearances are necessary to prevent rubbing of the tire on the bottom of the strut, and would really like to avoid trial and error at the local tire shop
But I guess that's what I might end up doing
Thanks for the replies!