Not to muddy the waters, BUT I have been running the exact same 1" spacers/adapters on my street driven Duster for 2 years now with no issues at all. And I've gone well over 45 MPH without a wobble or anything. Are they ideal, no but not a glaring safety hazard either. With that said, would I run them on the drag strip? Probably not, but they are a means to an end until the SBP to BBP swap can be done.