hey brother, you can go to the darkside as mentioned here. my question to you being a local here, is find out if there's a tire shop that will mount it for you, unless you have some equip and tools to do it yourself. if that's the case shoot me pm (private message on here) or let me know, and i can try to give you a hand. i've been entertaining the thought, but couldn't find a tire place, nor bike shop to mount tire for me. please keep us informed as to what you've decided and if you do it post a pic of your new car tire on the bike.
Yokohama Avids also the Michellin Hydroedge, Goodyear Triple Tread, seem to be the most popular. my understanding is that you can use a 205/70/15 without having to do any mods to the rear at all.
yes, you are getting ribbed a bit for the square tire comment. i would be doing the same, except i'm interested in any information about mounting you may find out local!!! every or at least a few people here know that i'm the most serious that has ever posted anything on here, promise, true true,

atriot:
;-D