I bought a set of rotors from ebay and when I tried to put them on today I was told that my wheels are now hitting my caliper, so I am going to need to use some spacers in the front for the wheel to clear.

Now my question is that if I buy the spacers that they sell on ebay which are 3mm would I need to get longer wheel studs as well? Is it possible to go 6mm without adding new studs? Thanks.

you should be able to go that far back off the stud without any issues.

6mm right?

I've never, ever heard of rotors causing that problem. Either they are the wrong ones, or the fronts are mixed with the backs or something.

Yeah, I'm with Mike. There has to be something wrong with the rotors--the only way a change in rotors could cause the calipers to hit the wheels is if the cross-sections of the mounting faces of the rotors are too thin. That's something that would concern me...

That doesnt sound too good. Ill go out and measure the rotors in a bit (stock vs aftermarket). I bought these off ebay from r1concepts.

Oh yea, and before the new rotors, my wheels just barely cleared the caliper, so I assumed that the stock rotors were worn and got shorter in depth. If that makes sense. Maybe that is why new rotors and making the caliper touch the wheel?

The thickness of the braking part of the rotors won't make any difference in the caliper clearance (those are expected to wear over the life of the car). Only the mounting surface of the rotor will make a difference, and it doesn't wear--it's basically sandwiched between the wheel and the hub, so its thickness shouldn't even change a whole heck of a lot from oxidization.

I missed the part where you have aftermarket wheels; if your calipers were just clearing, then it probably just took a few thousandths decrease in the thickness to cause interference. On stock wheels, you probably wouldn't notice it; once you get the spacers in, you should probably be OK.

Thanks for the good info guys!

just grind your pads down a little.

I bought my hub-centric spacers from http://www.wheeladapter.com/home.asp I have 8mm in the front and 9mm in the back. I haven't had any issues with clearance on the StopTech brakes.