With Trail Angel you can secure your child's bike to yours and cycle independently once you have reached a safe location.So simple to fit from the very first time, Trail Angel easily secures and adjusts with the turn of a knob. With Trail Angel you can travel together to your destination in total safety, then allow your child to ride independently once you have reached a safe location. The device is extremely easy to hook and unhook and it can be folded back onto the adult bike to permit independent movement. Once folded closed Trail Angel occupies little space so it is perfect to take on holiday with you.**Adult Bike Requirements*** Wheel diameter: 25" minimum* Seatpost diameter: 1" - 1.25"**Child Bike Requirements*** Wheel diameter: 10" - 20"* Handlebar Diameter: 1.34" - 1.50"* Child weight: Max 30kg* Child bike weight: 15kg