Pinnacle ash 20 inch kids bike pinnacle childrens bikes are for all round use and maximising fun there light and simple ideal for parents who want small proper bikes that help children get the most out of cycling at an early agequality aluminium frames keep the weight low the small block style bmx tyres for mixed terrain riding the bikes all use twin chain plates to avoid derailed chains and parents with greasy hands rear only gears keep it simpler for learning the basics rigid forks ar