I'd like to try using two wheel hubs from a moped, remove the brake from one.. Build a frame for the two... Add and extra long brake cable and to the drum with the brakes... And there you go! I figured if you are in a garage you could just raise the temp in the winter and put your rear wheel on it and use the brake on one of the drums to add resistance and use that to jet with out having to leave. Add a capable speedometer to the rear wheel .