Now I fully understand that these machines are NOT designed with fuel economy at the forefront but I am interested in things people have done that may help the mpg during the routine work week. For now I am commuting to work (poor house selling market) and the nature of my work has me running between school buildings...but they pay for that mileage. Anyway my first thought is the rear tire, is anyone running without it on the back while on-road driving time warrants the effort to take it down? I know its not going to lighten the load a whole lot but I also know that a rim and tire are not exactly featherlight. It also crossed my mind that with the placement of the spare it could be part of the overall balance of the vehicle...is this the case?