Warning! The use of urethane slot car tires may be habit forming, may keep you up late at night, may result in drowsiness at work and desires to retire early, may lead to impulse purchasing, longer straights and more radius curves, lower lap times, illusions of grandeur, desires to kick someone’s butt, may urge you to upgrade your motor. If you experience lapping sessions longer than four hours, invite a friend or two for support. Do not operate vacuum cleaners, lawn mowers, pressure washers, or hedge trimmers while thinking about slot cars. Not recommended for adults of any age!