my wheels are rubbing on the inside of the fenders, what can i do to solve this problem

 

What kind of car? what kind and size of wheels? If not stock, do you know your offset? If you are running stock 16" wheels, you may need to add the factory spacers if they are missing in the back, and if that is where your problem is. Is your car lowered?

 

i have an 84 firbird SE, the wheels are like late 80 early 90's firebird wheels, they kinda look like gta wheels but there 15's

 

I assuming that you are talking about crosslace wheels, and while I'm not sure, I don't think Firebirds came with them in 15". They are probably aftermarket, and the offset is probably wrong for your car. There isn't a 15" thirdgen wheel made that should have any problem with rubbing on your car. Can you post a pic?