STURDY FRAME- Sturdy Hi-Ten steel frame and fork provide awesome impact resistance when riding over rocky and bumpy terrain, easily surivive the multiple bumps of learning balance. EASY TO STOP Front Caliper Brake and Rear Coaster brake are easy to provide phenomenal stopping power when needed, so they can stay in full control, a great option for young Kids riders. SAFE RIDING The amazing ride comes ready to rock with steady wheels, wrapped in Rubber off-road tires for outstanding grip and stability in any weather conditions. MININUM MAINTENANCE Thanks to its single-speed drivetrain & black tire, this tough ride is low maintenance and very easy for your little thrill-seeker to get pedaling up to speed in a flash. SIZE CHART & ASSEMBLY:16 inch bike is suitable for 4-7 years (41-53 inch) boys.18 inch bike is suitable for 5-9 years ( 45 57 inch) boys.20 inch bike is suitable for 7 + years (53-65 inch) boys. Adult assembly is required. The bike comes with 85% assembled boyd and the basic assembly tools in the box.