If a set of bbs 17x9 +42 17x10 +50 were reversed mounted, what would be the new offset? I have someone local i am checking out some wheels and he is about to reverse mount it.

 

I have no idea. I do know that BBS will not warranty the wheels. They also do not sell the bolts to put the wheel back together.

 

I've heard you achieve an increase anywhere from 12-15mm depending on who is saying it, so you can guess from there. So you would probably end up with something around a 17x9 +27 and 17x10 +35... in other words very aggressive.

 

Yes its right around 15mm difference for reverse mount.