Strider's new aluminum-framed ST-PRO is about two pounds lighter than the company's steel-framed balance bikes, making it easy for even the smallest children to handle.
The Strider ST-PRO was designed and built based on the same no-pedal design as the original Strider. At under five pounds, it is the lightest Strider available to date and was designed for toddlers aged 18 months to 5 years old. It has puncture-proof 12-inch EVA polymer tires, adjustable seat and handlebar and a number plate.
Source:
http://www.bicycleretailer.com/new-products/2013/09/26/striders-aluminum-st-pro-shaves-weight
