The Pony balance bike from RoyalBaby is the perfect combination of quality and style. This is a great first bike to teach children how to balance on two wheels. The seat and handlebars are adjustable to accommodate children ages 2-5 (12.7"-18"). This bike assembles with no tools and adjusts with quick release levers. The frame is made from alloy and the 12" tires are air filled. The axles are metal as well as the headset for a smooth experience overall.LIGHTWEIGHT FRAME: This sport Pony balance bike with aluminum alloy frame and rim is a perfect combination of quality and fashion. This is a first step for a kid to learn how to ride a bike.EASY CARRYING: Unique patented design seat with storage space with CARRYING STRAP which is used for parents to carry the bike easily. The strap is easy to use and simple to install. Use it before or after your little one rides.TOOL LESS ASSEMBLY: The seat and handlebar heights adjust to accommodate ages 2 to 5 years. The adjustable height of the seat about from 12.9 inch to 16.5 inch. Quick Release, tool less assembly.UNIQUE CHEST REST PAD: This alloy balance bike is equipped a unique chest rest pad which is made by a kind of soft and healthy material. Provide protection for kids during riding.AIR TIRE and METAL AXLE: Metal axle and headsets is smoother and stronger then plastic ones. Air tire is more comfortable on various kinds of roads. Soft cushioned grips and padded seat are fit for the smallest of riders.