I agree with Scootereno. There is no one right answer. I've run Bridgestone, Michelin, Shinko, and Metzler tires on the back of my 400. I've run Bridgestone and Metzler tires on the front. As he mentioned the front tire will last around twice as long as the rear tire. All worked fine as far as riding is concerned but I was disappointed with the wear characteristics of the Shinko. I've currently got a Bridgestone hoop on the front and a Michelin Power Pure on the back.