If you haven't posted this question at TWF racing, an SV racing site, http://www.twfracing.com/vbforums/forum.php I recommend that you do. Zoran is the moderator and knows a lot about SVs. I have a 2nd gen, 2004, and I bought wheel spacers from him in order to convert to a 5inch rear wheel so I could use a bigger tire. He has a conversion for a 1st gen if you want a 5inch tire. Hope this helps.