The Globber GO Bike Air is great for toddlers ages 3-6. The wheel features 10" pneumatic rubber tires for maximum shock absorption. A smooth, safe ride. The balance bike's thoughtfully designed reversible frame allows you to quickly and easily switch the balance bike from a low to a high frame position, so you can continue to use it as your child grows and develops their motor skills! The Globber GO Bike features a 6-position height adjustable saddle (3 heights per frame) The saddle is made of a soft and comfortable PU. The curved handlebar is 2-way height adjustable and is equipped with TPR ergonomic grips. The footrest can be attached or removed without tools. With the Globber Go Bike Air your child learns to ride a bike easily. It promotes the sense of balance to be able to quickly switch to a larger bike. . Wheel: 10" pneumatic tires . Frame: 6 steps adjustable . Adjustable: saddle and handlebars.