Kids' Bicycles

When choosing an appropriate bike for your child, you should always make sure it is the right size. The size is crucial for the child to be able to control the bike properly.

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The table below shows the values that will help you decide. Individual brands vary, so please consider the values in the table only as a guidance. To be sure, put the child astride above the top tube with the feet on the ground. The gap between the crotch and the tube frame should be about 5 cm. Always set the saddle height so that the child can reach the ground.

Also observe the correct seating position of the child. The child should not be stretching on the bike and handlebars should not be too high. The ideal height of the handlebars is at the waist level of the child. Underestimating these factors can lead to bad riding habits.

Children's bicycle sizes are numbered slightly differently than the ones for adults (seat tube length) and are measured according to the wheel diameter.

Size in inches (diameter)	Child's height in cm	Approximate age of the child
12 "	90-100	2-3 years
14 "	95-105	3-4 years
16 "	100-115	45 years
18 "	110-120	5-6 years
20 "	115-130	6-9 years
24 "	125-155	9-12 years

How to choose a kids' bike

AUTHOR Cosmic 20 2025 10" Black/Orange

7,990,-

In stock > 5 pcs

Children's Bike - children's bike 20" wheel from the age of 4 years, without suspension, meant for recreational use, aluminium frame, frame height: 254mm, frame size: XS, light...

Added to cart

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AUTHOR Limit 26 2026 13.5" silver/lime

11,990,-

In stock 4 pcs

2 colors

Children's Bike - children's bike 26" wheel, without suspension, meant for sports use, aluminium frame, frame height: 343mm, frame size: S, with Without theme theme, light weight,...

Added to cart

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DINO Bikes Junior sports bike Dino 24" orange

6,145,-

In stock 4 pcs at the supplier's

2 colors

Children's Bike - mountain bike 24" wheel, without suspension, steel frame, for children weighing up to 100kg

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ACADEMY S-GRADE Trail 4 Amber

23,290,-

In stock 3 pcs

2 colors

Buy at the price for both existing and new AlzaPlus+ members 20,961,-

Children's Bike - trail bike 20" wheel from the age of 6 years, front suspension fork, meant for sports use, aluminium frame, frame height: 240mm, with Without theme theme, for...

Added to cart

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AUTHOR Record 16 2025 9" Grey/Green

7,990,-

In stock > 5 pcs

3 colors

Children's Bike - children's bike 16" wheel from the age of 3 years, without suspension, meant for recreational use, aluminium frame, frame height: 229mm, frame size: XS, with...

Added to cart

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AUTHOR A-Matrix 24D 2026 12.5" White/Black/Blue

11,990,-

In stock 4 pcs

3 colors

Children's Bike - children's bike 24" wheel, spring fork and front suspension fork, meant for sports use, aluminium frame, frame height: 318mm, frame size: XS, light weight, with...

Added to cart

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AUTHOR Limit 24 2026 12.5" White/Gold

10,990,-

In stock 4 pcs

3 colors

Children's Bike - children's bike 24" wheel, without suspension, meant for sports use, aluminium frame, frame height: 318mm, frame size: XS, with Without theme theme, light weight,...

Added to cart

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AUTHOR Limit 24 2026 12.5" Silver/Yellow

10,990,-

In stock 4 pcs

3 colors

Children's Bike - children's bike 24" wheel, without suspension, meant for sports use, aluminium frame, frame height: 318mm, frame size: XS, with Without theme theme, light weight,...

Added to cart

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AUTHOR A-Matrix 24D 2026 12.5" Matte Titanium/Black/Red

11,990,-

In stock 4 pcs

3 colors

Children's Bike - children's bike 24" wheel from the age of 8 years, spring fork and front suspension fork, meant for sports use, aluminium frame, frame height: 318mm, frame size:...

Added to cart

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Academy Grade 4 20-8S Microshift purple

5×

11,990,-

In stock 3 pcs

6 colors

Children's Bike - children's bike 20" wheel from the age of 6 years, without suspension, aluminium frame

Added to cart

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Toimsa T14218 SR Sport 14

1×

3,099,-

In stock 3 pcs at the supplier's

2 sizes

Children's Bike - children's bike 14 " wheel, without suspension, meant for recreational use, steel frame, frame size: XXS, balance wheels, mudguard and with drink holder, for...

Added to cart

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Academy Grade 5 24-7S Nexus belt Yellow

17,890,-

In stock 1 pcs

6 colors

Buy at the price for both existing and new AlzaPlus+ members 16,101,-

Children's Bike - children's bike 24" wheel from the age of 7 years, without suspension, aluminium frame

Added to cart

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AUTHOR Limit 26 2026 13.5" White/Silver/Pink

11,990,-

In stock 4 pcs

2 colors

Children's Bike - children's bike 26" wheel, without suspension, meant for sports use, aluminium frame, frame height: 343mm, frame size: S, with Without theme theme, light weight,...

Added to cart

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Rock Machine Blizz 20 MD Gloss Red/White/Black 20 × 10.0"

11,990,-

In stock 3 pcs

2 colors

Children's Bike - children's bike 20" wheel, without suspension, meant for recreational use, aluminium frame, frame height: 250mm, with Without theme theme, light weight, pedals...

Added to cart

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AUTHOR Cosmic 20 2026 10" Silver/Pink

8,990,-

In stock > 5 pcs

3 colors

Children's Bike - children's bike 20" wheel, without suspension, meant for recreational use, aluminium frame, frame height: 254mm, light weight, for children weighing up to 30kg

Added to cart

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AUTHOR Cosmic 20 2026 10" Grey/Black/Red

8,990,-

In stock > 5 pcs

3 colors

Children's Bike - children's bike 20" wheel from the age of 4 years, without suspension, meant for recreational use, aluminium frame, frame height: 254mm, frame size: XS, light...

Added to cart

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AUTHOR Record 20 2025 10" White/Silver/Red

9,990,-

In stock > 5 pcs

2 colors

Children's Bike - children's bike 20" wheel from the age of 4 years, without suspension, meant for recreational use, aluminium frame, frame height: 254mm, frame size: XS, light...

Added to cart

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Volare Paw patrol 14", red

3,899,-

In stock 5 pcs at the supplier's

2 variants

Children's Bike - children's bike 14 " wheel, for boys from the age of 4 years, without suspension, meant for recreational use, steel frame, for beginners, balance wheels and...

Added to cart

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AUTHOR Record 16 2025 9" white/pink/purple

7,990,-

In stock > 5 pcs

3 colors

Children's Bike - children's bike 16" wheel, for girls from the age of 3 years, without suspension, meant for recreational use, aluminium frame, frame height: 229mm, frame size:...

Added to cart

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AUTHOR Record 16 2025 9" Lime/Blue

7,990,-

In stock > 5 pcs

3 colors

Children's Bike - children's bike 16" wheel from the age of 3 years, without suspension, meant for recreational use, aluminium frame, frame height: 229mm, frame size: XS, with...

Added to cart

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Volare Batman 16" Black

4,399,-

In stock > 5 pcs at the supplier's

Children's Bike - children's bike 16" wheel, for boys from the age of 5 years, without suspension, meant for recreational use, steel frame, for beginners, balance wheels and...

Added to cart

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ACADEMY S-GRADE Trail 4 R Amber

19,590,-

In stock 1 pcs

2 colors

Children's Bike - trail bike from the age of 6 years, front suspension fork, aluminium frame

Added to cart

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Toimsa T16146 Speed XSP 16

3,299,-

In stock 2 pcs at the supplier's

Children's Bike - children's bike 16" wheel, without suspension, meant for recreational use, steel frame, for beginners, pedals included, balance wheels and mudguard, for children...

Added to cart

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Toimsa T16210 Jungle 16

3,299,-

In stock 2 pcs at the supplier's

Children's Bike - children's bike 16" wheel from the age of 4 years, without suspension, meant for recreational use, steel frame, for beginners, pedals included, balance wheels and...

Added to cart

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In the category Kids' Bicycles on Alza.cz, we currently have a total of 272 products, which you can easily buy online and get quickly delivered. See all of your purchases and make orders on our easy-to-use app. Continue

Kids' Bicycles

Kids' Bicycles – proved brands

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