What if the owner of the said bike bought it to be a cruiser and not a performance bike? Is he still stupid if he decides to run a car tire? I thought the Tbird was a cruiser, not a performance bike. If you want to scrape pegs in turns should you have not bought a Triple Speed?
Performance and Cruiser are not mutually exclusive. If you pay "Good Money" for a bike, you expect it to have "Performance" characteristics. With car tires you'll be scraping more then a peg.