I have recently installed SA 15" rims with 215/75-15 Michelins LTX's. I
wanted to use 235/75-15.  (My van is a Syncro Westy).  Decided on the
smaller size so that I could carry a spare in the normal place up front
with minor modifications.

the Michelins are very stable and quite on the road.  They are expensive
however.  I paid $110 each.   About a week after I bought them Sears had a
sale on essentially the same tire (re-named for Sears) for $70 each.  Keep
your eyes open for those sales.

Warren C.