Using this bar, you can attach nearly every childâs bike on an adult one. This means that there is no more waiting for the âslow onesâ. The tandem bar can also be used to help to learn to ride. The bar is easy to mount & no tools are required. * Quick adapter * Sturdy construction * Can be used on childâs bicycles sized 12â â 20â * Can take a childâs weight of up to 32kg * The child can peddal or freewheel * The childâs handlebars are stabilised when the bar is in place