The true definition of a Muscle Bike is unknown, but the closets we have is it mimicks the Muscle Car era. There are exceptions to the rules though. This site is dedicated to bikes from 1963-1973, and will always be first and Foremost for those bikes. Of course this puts some limits on us, so we also allow other styles of bikes too. We also have other guy interests such as Pedal Cars, toys ect.. Join in the fun and help us track the True History of the High Rise Bicycles.