The disc rotors with molded in caliper make any pegasus wheel or other open wheel look great. They are easy to use, easy to glue on being plastic, and can be painted to look like real calipers and rotors. I have only used them for the pegasus wheels, but as long as a wheel has an axle post on it, they can be used for other types of wheels as well. Downside, they need that axle post to attach the rotor to the wheel, or attach something to put the rotor on.