I've been shopping around for some supermoto wheels to throw on my 98 WR400 for the winter and won with a low ball $800 bid for this pair of Alpinas: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=150304905346&sspagename=STRK%3AMEWNX%3AIT&viewitem= Anyway, I assume with the tubeless rims I can just buy any street tire I want, but what are the widest tires I can run with a 3.5" front and 5" rear rim on a WR? I run Michelin Pilot Powers on my street bike, but are there any special considerations I have to account for on a dirt bike? I imagine you can feel the weight of the tires quite a bit more, so maybe narrower is actually better. Also, I can already do a stoppie with the stock front brake, so what is the real reason for the big front rotor? Modulation? Racing?