The FunTrain is an automatic, hydraulic braked double rider cycle trailer, which can be attached behind an existing or new Fun2Go side-by-side bike. In this way an attendant can safely cycle with three co-riders or usually with one co-rider on the Fun2Go itself. A tow bar is simply fitted on the existing Fun2Go. The FunTrain has a safety lock which cannot come off on its own and an automatic hydraulic overrun brake. This gives the driver of the front duo bike 100% control over the Fun2Go and FunTrain.