you might like to read last months superstreet bike. Alot of it was about extended bike's and what you can do stunts, corners, and drag. As for a big wheel bike all your doing is adding weight but I wouldn't go over a 240 if your draging. I have an 06' R1 with a 240 kit and 30 shot and extended 10+. I don't have a problem with corners I may not get as low as the rest of the people but everyone thinks there a racer. If the man wants to extended his bike thats what set's him apart from the rest. To each is there own, if you don't like what you see...well LOOK THE OTHER WAY!