Please have a look at the Aurora website. Tom has some helpful details on possible backspace etc. My car #114 has currently 16x7 (8inch wide) with 5.25 Backspace. They just fit under the fender but this is really the maximum that is possible. So let the Dayton dealer advise what is possible when you like to have narrower wheels. 15x6 should have 4.65 backspace minimum I guess. That's what I will try next. Btw, they also make a bolt-on version of the wire wheels for those who like it.