The Darwin is a lightweight, belt-driven children's bike, available in 16" and 20" sizes. The low-step aluminum frame makes it easy to get on and off and provides stability, while the maintenance-free belt drive eliminates the need for chain lubrication and dirt. Equipped with effective V-Brakes, a steering limiter, and an adjustable seat post, the bike grows with your child. Its robust construction ensures safety and durability, while maintaining a very low weight – 6.08 kg (16") and 7.07 kg (20") – making the Darwin an ideal choice for young cyclists aged 3 to 10.
ROCKBROS | SKU:
70040002203
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Darwin – 16″ and 20″ Kids Belt Drive
Sale price
1.35300 zł
Regular price
1.69200 zł
Unit price
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Darwin – 16″ and 20″ Kids Belt Drive - Darwin -20″ Belt Drive is backordered and will ship as soon as it is back in stock.
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Delivery and shipping
Delivery and shipping
Free shipping to Germany, Austria and Poland, with a delivery time of 2-3 days. For orders over 80 euros, shipping costs are free to most other European countries. For more information, click here .
2-year warranty
2-year warranty
The warranty covers material and manufacturing defects, ensuring that you will be completely satisfied with your purchase.
Specifications
Specifications
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Payment & Security
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Review
This is the right bike for your child if…
Are you looking for a lightweight, safe and maintenance-free children's bike that grows with your child and is tailored to the needs of young cyclists.
The technologies you get
An ultralight aluminum frame with a low step-through, adjustable seat post, and reinforced triangular construction (up to 45 kg). Plus, a quiet belt drive, reliable V-brakes, and a handlebar limiter for added stability. Thanks to its well-thought-out design, the bike can be assembled quickly and easily.
Special features

Lightweight aluminum frame
Made of high-strength aluminum – lightweight and low density. Lighter than a steel frame, making it easier to ride.

Adjustable seat post
It adjusts to your child's height. The low frame and simple design make it easy to get on and off. The reinforced triangular frame supports up to 45 kg and provides exceptional durability.

Belt drive and precise V-Brake
The maintenance-free belt drive ensures a quiet, smooth ride without rust or slippage. The responsive V-brake provides reliable stopping power, even on hills. The steering angle limiter increases stability.

Easy assembly – ready in just a few moments!
Thanks to its well-thought-out design, the bike can be folded in a few simple steps, allowing you to start riding quickly and effortlessly.
Note: 12” balance bikes and 16”/20” models with belt drive do not require front wheel assembly.












