Yes, they will mount on your 2.15x17 rims, but 2.15" [ inside bead-to-bead] is way more than you need, and of course they will be heavier, but they will mount and bead-up just fine. You will lose some tire height, but not a big deal.
So keep-in-mind one pound of rotating weight is equal to 9-10 lbs of static weight, and the more rotating weight you are trying to move the more HP you will use/ need. Old school thought is 100 lbs = .10 of a second.
Jon