This innovative product allows the cycle to be used as either as a tricycle or as a trailer unit. It has all the standard features of a TMX Tricycle with its sturdy frame and easy pedal gearing but with the ability to be quickly changed into a trailer unit. The package includes a TMX tricycle with a frame folding mechanism which can be converted to a trailer cycle by replacing the front section of the tricycle with an extension arm which joins to the adults cycle.