Guardian Premium Kids Bike, SureStop anti-lock childproof brake system, 20 inch wheels for heights 3’8” to 4’5”, 6-speed, threadless headset, sealed bottom bracket, Matte Black, Blue and Green Price: $419.00 (as of 20/10/2019 01:39 PST- Details)

Patented SureStop brakes prevent head-over-handlebar accidents and allow kids to stop faster.
20 inch wheels — for heights 3’9” to 4’5” (approx ages 5-9)
Super light weight at 20.5lbs means exceptional handling, control and safety.