Superior Magnesium Alloy Frame: Featuring a sturdy and anti-deform magnesium alloy frame, the 16 inches kids bicycle is strong enough to withstand multiple bumps. The lightweight magnesium alloy frame also makes it easy to carry and transport. Plus, there are inner brake cables hidden in the frame for rust inhibition. Equipped with Dual Disc Brakes: The kids bike has dual disc brakes for quick braking and long-lasting lifespan. The front hand brakes are designed with shorter distance for kids' small hands to control the bicycle. Moreover, the fully enclosed chain guard prevents kids' feet from getting pinched for increased safety. Adjustable Handlebar & Seat: The saddle can be adjusted in 21.5 -25.5 , while the handlebar is height-adjustable in 25.5 -28 , making the bike an ideal option to accompany your child to grow. The inseam size is 21.5 -25.5 . FeaturesAdjustable seat & handlebar make it suitable kids of different heightsQuick release lever for easy adjustment and tight fixationEnduring magnesium alloy frame for portability and long-term useOur inner brake cables are better than other external brake cablesFully enclosed chain guard for safe ridingDesigned with a safe brake system: handbrakes and dual disc brake2 removable training wheels to help kids learn to ride and keep balanceAnti-slip foot pedals for safe pedaling3-layered rubber wheels rubber outer, tire chafing strip, and inner tire for long-lasting ridingIdeal for cement floors, boardwalks, asphalt roads, and moreFun riding gift for kids aged 4 to 7Perfect for building strength, improving balance, and developing self-confidenceFront and back reflectors ensure easier visibility to others2 detachable training wheels help beginners gain confidenceBicycle bell brings additional funIncluded tools for fast assemblySpecificationsColor: BlackInseam Size: 21.5 -25.5 Material: Magnesium Alloy, Metal, Rubber, PPOverall Dimension: 44 x 21.5 x 25.5 -28 L x W x H Recommended Age: 4-7 Years OldRider's Height: 41.3 -51.2 Saddle Height: 21.5 -25.5 Seat Size: 9 x 5 L x W Weight Capacity: 145 lbsWheel Size: 16