Wheel sizes to fit wilwood 13" and 14" rotors? I Was Told, generally speaking 17s for the 13" rotors and so i might assume 18s for the 14" rotors. However this depends on the rim. So i wonder if it's possible to fit a 14" rotor on 17" rims?

I think i say all that because 17s still have room for tires with some side wall, which i assume has an effect on traction when cornering. Also

You have the same rule of thumb I use. 17's for 13" rotors and 18's for 18" rotors. Sometimes brake kit sellers offer a template to check wheel fit. I run 17's with 13" rotors and Cobra style brakes. It fits but pretty close... and works quite well on the track.

As far as tires, generally short sidewall helps handling responsiveness. If you are looking for an ultra high performance handling tire, selection in sizes appropriate for or cars will be better with 18's.

I really like the 13" Cobra based system. Cost is reasonable, it works quite well and can be serviced with readily available parts. Have a look at Dr Diff. He offers the Cobra based system as well as 14" systems and higher end calipers.

My Stage 4 Dr. Diff kit with 13" rotors did not allow a 17" Bullet Mustang wheel fit on the hub. The caliper tops were scraping on the inside of the wheel. Just know that it will be tight. Generally Wilwood calipers are a little less bulky than mine.

Yeah mine will be wilwoods for sure. I have considered just getting 18s but, i don't think they sell OEM style wheels in 18s but, just 17s and lower.

http://www.forbbodiesonly.com/moparforum...#post-910503220

supposedly there are trades of wheel sizes after a certain point.