This K2 Z is sized to give your biking prodigy a head start while optimizing safety! Sturdy, high-tensile steel frame and fork feature a uni-gender build with a low standover height for small cyclists. Single-speed, one-piece crank with chainguard requires little maintenance. Rear coaster brake for comfortable learning. Alloy rims will not rust even when junior leaves the bike out in the rain; knobby tires provide great traction in the dirt. Includes a set of heavy-duty training wheels to get new riders started.