RockBoard Accelerate Self-Powered Scooter Unique Features Propel without ever putting a foot on the ground Ultra-strong steel box frame & front fork / steel Rockboard deck Wheel Size: 200mm urethane wheels with rigid nylon spokes; Rock Mode: 27 in. - Kick Mode: 29 in. Maximum Weight: 220 lbs.; Color: Black & Green; Handlebar Height: Adjustable: 36 in. - 46.5 in. Recomended for ages 8+!