Precaliber 24 7-speed Boy's is a classic kids' bike with great style, performance, and durability. It has the simplicity of a 7-speed drivetrain and intuitive twist shift that makes it easy for kids to ride varied terrain. Plus, it's equipped with knobby trail-ready tires and a lightweight aluminum frame that'll stand up to even the roughest riders. For kids ages 8-12, between 51-59? tall.