Trek Precaliber 16 Kids Bike The Precaliber 16 Freewheel provides an enjoyable and educational platform for children to learn how to ride with ease and confidence. This bike features a single-speed design and dual handbrakes, allowing kids to build their skills while mastering brake lever usage. The saddle incorporates a convenient handle for parents to guide their young riders, and the tool-free training wheel system ensures effortless installation and removal. Designed for kids aged 4-5 and measuring 39-46? (99-117 cm) in height, the Precaliber 16 Freewheel is a perfect fit for young riders ready to embark on their cycling adventure.