The crash bars are bolted in‘This is my question too. We know there is about 1” clearance to the upper control arm of the suspension and about 3-4” to the crash bars (on non squatched Broncos). @jaruss01 can help us with specifics but I bet that with this positive 55 offset it will rub if one wants to add 35s or 315s to this wheel. Unless you add spacers and cut off the crash bars, but I would not personally run spacers.