Children's bicycle Martes Ninja size 20, wheel 20"

Children's bicycle Martes Ninja size 20 with 20" wheels is designed for older children who are developing confidence and skill on two wheels. The bike features a child-oriented frame geometry, scaled controls and pedals, and a lightweight construction that makes mounting, steering and maneuvering easier for young riders. With 20-inch wheels the model is suitable for paved roads, bike paths and light off-road trails commonly used by children.

Advantages

The Martes Ninja combines a frame sized for children with ergonomically positioned handlebars, brakes and saddle to support safe riding posture. Its 20" wheel diameter balances stability and agility, allowing smoother rolling over small obstacles while remaining responsive to steering input. Lightweight components reduce the physical effort required to start and stop and simplify handling during turns and when lifting the bike. Scaled pedals and grips ensure more secure foot and hand placement for smaller feet and hands.

Suitable for

• Children transitioning from smaller bikes to 20" wheel size
• Riding on paved streets, bike paths and school routes
• Light off-road riding on compact trails and park paths
• Learning to build balance, braking and shifting skills

Key specifications

• Wheel diameter: 20 inches
• Frame: children's geometry, lightweight construction
• Controls: scaled brake levers and grips for smaller hands
• Pedals: sized for children's feet
• Use: paved and light off-road surfaces

How to use

Before each ride adjust the saddle height so the rider can place the balls of their feet on the ground while seated and confirm handlebar and brake lever positions offer comfortable reach. Check tire pressure and brakes for proper function. Start riding on a flat, traffic-free surface to practice balance, pedaling and braking. Progress to longer rides and light trails as skill and confidence improve, ensuring that the child wears an appropriate helmet and protective gear at all times.

Usage recommendations

Regularly inspect the bicycle for loose bolts, wear on tires and brake pads, and ensure moving parts are lubricated. Use reflectors or lights for low-light conditions and select routes that match the child’s skill level. Replace worn grips or pedals with appropriately sized components to maintain safe control.