I have a problem with my front wheels rubbing my bumper, if i install wheel spacers behind my rims, can that help me with clearance or are those mainly for ball joint spacers. thanx

 

How thick of a spacer are you looking at? Is it just a spacer? (which will require longer studs) Or are you thinking of adapters that bolt to the hub?
Also if you use spacers or adapters INMO you will have to do the same to the rear or else it will look funny.
What size are your wheels? Where is it rubbing the fender at? YOu could always trim the fender.

 

They are 245/40/18. They are rubbing the inside edge of the bumper where it clips onto the inner wheel well when i turn on either side. It has rubed the clips off and now that front bottom facia piece always falls down because the wheel pulls it out of the clips in the bumper it rests in

 

I run 275/35/18 with no problem. I think the offset of your wheels are wrong.
1. You could cut the fender to make it work
2. smaller tire (may not look right)
3. spacer or adapters

 

What is the width and offset of your 18" wheels? That will determine why it is rubbing, and how to solve the problem.

 

How do i measure the offset

 

Try this:


https://www.rsracing.com/tech-wheel.html

 

Many wheels will have the offset stamped on the inside of the wheel or backside.

 

Sounds like your front wheels already have too little + offset. Adding spacers is only going to make the rubbing worse.
With out putting different offset wheels on you car the only thing that I can think of that might help is have the car aligned with less + caster, and maybe a little more - camber.