Ready to ride, straight from the box! Just tighten the three bolts on the steering column, adjust the seat, and the AIRO is ready for your little one to hit the road. The only tool you'll need is the included Allen wrench, with no additional hardware. The seat makes this balance bike suitable for children with inside leg measurements between 30cm to 46cm (11.8” to 18”) This spans an average of ages 18 months to 5 years. No need for training wheels, ever! The pedal-less design of a balance bike means the feet act as the training wheels, so kids learn the proper way to balance on their center of gravity. The grip taped footrests are contoured into the frame for easy freewheeling, air-filled rubber tires for a smoother ride and a padded stem for extra protection. Fully safety tested by TÜVRheinland for children aged 18months+ (EN71). CE approved. Hit the trail with confidence on the 12.5"" (32cm) rubber air filled tires which handle beautifully on dirt roads and other unpaved surfaces. Sealed wheel bearings offer added protection against weather conditions and road debris. At just 6.5lbs (3kg), the AIRO is lighter than all 23 comparable balance bikes on the market today, making the ultra-hard-wearing magnesium alloy frame the easiest one out there for the rider to enjoy. Maximum rider weight of 66lbs (30kg). Made from a super lightweight, ultra-hard-wearing magnesium alloy, this levitatingly light balance bike weighs just 6.5lbs! It's perfect for little kids who don't have the muscle mass yet to haul around a heavy bicycle. Lifetime Warranty: The Hornit AIRO is among the best balance bikes on the market, and comes with a free lifetime warranty on the frame and forks. This reflects the top quality of the materials and craftsmanship, meaning more than one child will be able to learn to ride on the same bike! AIRO ships standard small parcel and requires no special handling.