【Lightweight Strong Kids Bikes】High-tensile carban steel fat tire kid's bike frame that's ready to hit the trail, lightweight but high strength for kids to control; Ergonomically step-throuhg design, provide a safe and smooth ride.【7-speed Drivetrain】Allows riders to switch gears with smoothness. The positioning is accurate, and silky gear shifts without stalling. The riders can select gears for various terrains quickly.【Double Disc Double Safety】 Mechanical disc brake system with 160mm rotors front and rear ensures safety. Both front and rear provide great stopping power, greatly reduce the braking distance and ensure that you can stop immediately in case of emergency.【20*4.0" Wide Tires】Wheels height up to 23 inches. Feature 100mm front suspension fork. The thickened outer wall is more resistant to shocks. The thickened shock absorbers help absorb shocks. The parallel bars can adapt to pressure road conditions; Wheels up to 23 inches, 5 times more wear resistance than ordinary bicycle tires. Strong grip and anti-slip, Fully capable of challenging any terrain, can conquer any off-road trails, city roads, beaches and snow.【85% Pre-Assembled】85% of the bike is already assembled. You will need to install the pedals, handlebars, saddle, front wheel, and inflate the tires. These will take about 20 minutes. We will provide bicycle manual and assembly video. If the manual is lost, please contact us for an electronic manual.