Prevelo Zulu One 14 InchThe new Zulu One builds on its legacy of innovation with significant weight reductions and groundbreaking BALANCE TEC conversion system. The patent pending BALANCE TEC system is the first ever balance bike to pedal bike conversion that doesn't compromise pedaling performance. The Zulu One features: A new smaller rear cog combined with a smaller chainring reduces weight while maintaining climbing friendly gear ratios Adjustable rear dropouts enable