Application This 16-Inch Bicycle Is Suitable for Children with Height of 105cm to 135cm (Normally Aged 5-8 Years Old). the Seat Can Be Raised from 46cm (18.1") to 53cm (20.9"). Specification Frame Material: Carbon Steel Alloy Cushion Material: Pu Leather Tire Material: Rubber Chain Cover Material: Plastic Gender: Universal Net Weight: 9kg/19.8lbs Wheel Diameter: 40.6cm/16'' Body Length: 115cm/45.3" Seat Adjustment Range: 46-53cm/18.1"-20.9" Handlebar Adjustment Range: 78-84cm/30.7"-33.1" Installation The Bike Needs to Be Assembled by Yourself After Receiving the Goods. You Can Refer to the Manual to Complete the Installation. Package Included 1 X Kid's Bicycle with Training Wheels 1 X English Manual Accessories Required for Installation.