I don't understand the OP. He buys a bike with ultra short chain stays so he can go Fast Fast Fast and lane change if a flea sneezes, and then he wants to put FAT tires on it. The OP should be putting 20's or 18's or even 16's if they make them so he can be faster then everyone else. Trade it in on a different type of bike if you want fat tires but don't try putting them on a racing bike.