Place holder post so I may post pics...

It looks like they woould be a problem with a 17" rim of any brand, doesn't it  I have been selling the heck out of those brackets and have not heard others having any issues.  Do you think it is that particular BOSS 338 wheel or all 17" wheels?  Can you back the camera farther away so we can get the full wheel view?

Ok, I think I see it.  The smaler ID of the wheel is hitting the caliper where the larger ID of the wheel would clear if that part was deeper in the back side of the wheel.  Most wheels have that smaller ID part closer to the FRONT face of the wheel where yours looks like it starts close to the back side.

I remember when the 13.2" brakes first came out I was telling everyone to use at least an 18" wheel to clear them (since the new GT uses an 18" wheel).  But, someone did some test fits and said they worked with his 17" wheels.  Apparently they do not work with ALL 17" wheels!  Thanks for posting that.  I will add the note on my instructions.

I really LIKE those BOSS 338 wheels.  Bummer they will not fit.

Last edited by MustangSteve (1/25/2014 8:32 PM)

so im guessing that if your front 17" wheel doesn't have that inner lip it should be problem free no?

screamin_67 wrote:

I wouldn't say "they wont fit", they just need some persuasion. I went with a different rotor that has a friendlier offset so the caliper sits inboard about .5".Same basic specs, 13" close to the same width and bore. Played with shim thickness on your brackets and clearanced the top of the caliper. It all fits nicely now and I only had to run a 3/8 spacer. To be honest, if I were to grind the calipers a bit more, I may be able to get rid of the spacer altogether.

Isn't it great to be able to mock up the system first, before you install the spindles.  Saves a lot of eye strain and sore necks from trying to see things under the fender.