Your dealer is lying to you...u dont have to trim the back at all and the front you just hold up to fender and trace curve of fender, trim and bolt on.
Installed 245/70 17 VENOM TERRA HUNTER X/T tires on my 22 BADLANDS.....and 235/ 65 18 FALKEN WILD PEAK A/T W3...on the wifes 21 BIGBEND today...and new lugnuts without the crappy chrome caps...
No rubbing on the BADLANDS already installed 1 inch adapters....but extremely close..
Well did a few things to my Badlands...
Added carbon fiber letter covers, front and back...got new Venom 245/70 17 tires to still put on...some knob covers, and a rear hitch tire carrier.
I have the flares from ford accessories, the front mudflaps have to be trimmed but i had ford put them on with absolutely no problems...i ordered my bronco with mudflaps, and had flares added....i got my spacers from amazon...but researched...and found the ones made by titan had alot of good...