Our premium range of academy childrens bikes are something a bit special built around a lightweight triple butted alloy frame weve carefully selected components that are perfectly in proportion with the intended rider for this 20 wheel 7 speed machine junior specific 114mm crank arms easy to pedal 32t chainring and narrow handlebars are just the start weve also designed our own unique 50mm handlebar stem to minimise any chance of knee injury as well as offering smooth one bolt he