Take them to Radial.
They can mount anything and all the AutoX people have had good luck with them and swear they don't scratch the rims(I Don't know because none of my rims are "nice")
I got 235/40/17's RA1's mounted on 17x7" rims there.
and I got 205/55/14's Kumho V710's on 14X5.5" rims.
Both of those are racing tires with stiffer sidewalls than what you will see on your normal tires.
