Ehh, I've got 15x4.5? or 5" on front, Jegs Star wheels. I can't remember the size, but they're Volkswagen tires, no rubs full lock either way.
I have a 15x7, 4" BS. I have 255 60's. Fender wells are cut by previous owner, maybe .5 inch, he didn't do a full cut, but it didn't need it with these tires. He cut the fender wells to fit 20x8's on them with 5" BS with very thin tires on them.
I've only got 15 miles on my set, so I can't tell you about bounce, but on the way home from the tire shop, felt good, didn't hear / feel any rubbing at all.