If I hit just the right dip in the road I would hear a scraping noise and from visual inspection under the car I have found nothing, thought maybe exhaust was sagging. Yesterday I noticed obvious rubbing on outside of passenger side tire from wheel well.

I did recently put some summertime rims on they are what I thought was close to stock (cragar 14x7 with 3.75" back space) the tires are 205 70 14. Just seems to rub more and more often. Driver side will rub occasionaly

Question is why now? Is backspacing wrong? Maybe suspension? Any Ideas?