i have 23x8.5x15 slicks and i was wondering what is the smallest width wheels i could use. could u use 15x6.5?

 

you could get away with 7's i think 6.5's would be pushing it.........think about it, 8.5's have 1.25" hanging over each side.

if you put them on a 6.5 wheel, you will bubblegum the tires and they wouldnt be flat. the wider the wheel, the flatter tire will be. make sense?