Description Hayes Performance Systems’ product development team set out to design a system for kids, using high-quality and high-performance components. The JUNIT ProTaper handlebar is one part of this two part system. Our Engineering team began by researching anthropometric data from a NASA database, and determined the average hand size of a 6-10 year old, which set the team into motion. Normally, grip diameter is a result of adding material to a standard handlebar size. For the JUNIT ProTaper handlebar system, we flipped the script. We began by determining the ideal grip diameter, and worked inward. The result is a handlebar that’s ideal for a smaller ergonomic profile. To be used only with JUNIT Grips, sold separately.