got to agree, wider is not necessarily better. just get as wide as you need. for the street I'd stick with close to stock sizes. love the avons but I've never raced on anything else. the sprint compound super venom (street tire) is sticky enough, I didn't like it much in the rain. but regardless that's what I run on my 550. rear is 130/70/18, front is 110/90/18, both bigger than stock but again I wouldn't say they're much better than stock sizes. only running that size because the front was on one of my 350f racebikes and was much bigger than necessary so I put it on my street bike. the rear I got from Joe. sad too, he was also only using about $75 of his $120 tire. <img src=icon_smile_wink.gif border=0 align=middle>