Bigger rims are the biggest bang for the buck improvement I ever did to my
van. Equal to an engine conversion, suspension wise.  Opens up a whole new
world of tire choices of appropriately rated tires.  I have 215/60 16
hydroedge on a Westy, 215/65 15 Goodyear Tripletreads on a 91 GL, and
225/70/15's Goodyear Fortera Tripletreads on a syncro. All of them are
great. I think the Hydroedge might be might favorite of the bunch. A
little expensive, but 90k mile tread.

John