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

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204 Results
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AUTHOR Record 20 2025 10" White/Silver/Red
Children's Bike - city bike 20" wheel from the age of 4 years, without suspension, meant for recreational use, aluminium frame, frame height: 254mm, frame size: XS, light weight, for children weighing up to 30kg, 2025 model
  419.99 €
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In stock > 5 pcs
Order Code: SPTautko275
ACADEMY S-GRADE Pump 6 Frost - Children's Bike Free delivery
to Alza branch
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ACADEMY S-GRADE Pump 6 Frost
Children's Bike - mountain bike 26" wheel from the age of 10 years, front suspension fork, aluminium frame
  899 €
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In stock 1 pcs
Order Code: SPTacd120
ACADEMY S-GRADE Pump 5 Frost - Children's Bike Free delivery
to Alza branch
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ACADEMY S-GRADE Pump 5 Frost
Children's Bike - mountain bike 24" wheel from the age of 7 years, front suspension fork, aluminium frame
  849 €
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In stock 1 pcs
Order Code: SPTacd118
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ACADEMY S-GRADE Pump 4 Plum
Children's Bike - mountain bike 20" wheel from the age of 6 years, front suspension fork, aluminium frame
  799 €
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In stock 1 pcs
Order Code: SPTacd115
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Academy Grade 6 26-7S Nexus belt blue
Children's Bike - city bike 26" wheel from the age of 10 years, without suspension, aluminium frame
  779 €
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In stock 1 pcs
Order Code: SPTacd086
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AUTHOR Cosmic 20 2026 10" Blue/White
Children's Bike - city bike 20" wheel from the age of 4 years, without suspension, meant for recreational use, aluminium frame, frame height: 254mm, frame size: XS, with Plain theme, light weight, for children weighing up to 30kg, 2026 model
  377.99 €
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In stock > 5 pcs
Order Code: SPTautko278
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AUTHOR Cosmic 20 2026 10" Silver/Pink
Children's Bike - city bike 20" wheel, without suspension, meant for recreational use, aluminium frame, frame height: 254mm, light weight, for children weighing up to 30kg
  377.99 €
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In stock > 5 pcs
Order Code: SPTautko280
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AUTHOR Cosmic 20 2026 10" Grey/Black/Red
Children's Bike - city bike 20" wheel from the age of 4 years, without suspension, meant for recreational use, aluminium frame, frame height: 254mm, frame size: XS, light weight, for children weighing up to 30kg, 2026 model
  377.99 €
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In stock > 5 pcs
Order Code: SPTautko279
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AUTHOR Record 20 2025 10" Grey/Lime/Red
Children's Bike - city bike 20" wheel from the age of 4 years, without suspension, meant for recreational use, aluminium frame, frame height: 254mm, frame size: XS, light weight, for children weighing up to 30kg, 2025 model
  419.99 €
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In stock > 5 pcs
Order Code: SPTautko276
ACADEMY S-GRADE Pump 5 Plum - Children's Bike Free delivery
to Alza branch
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ACADEMY S-GRADE Pump 5 Plum
Children's Bike - mountain bike 24" wheel from the age of 7 years, front suspension fork, aluminium frame
  849 €
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In stock 1 pcs
Order Code: SPTacd117
ACADEMY S-GRADE Gravel 5 Garnet - Children's Bike Free delivery
to Alza branch
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ACADEMY S-GRADE Gravel 5 Garnet
Children's Bike - gravel bike 24" wheel from the age of 7 years, front suspension fork, aluminium frame
  879 €
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In stock 1 pcs
Order Code: SPTacd112
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Academy Grade 6 26-7S Nexus belt red
Children's Bike - city bike 26" wheel from the age of 10 years, without suspension, aluminium frame
  779 €
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In stock 1 pcs
Order Code: SPTacd087
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Academy Grade 6 26-7S Nexus belt green
Children's Bike - city bike 26" wheel from the age of 10 years, without suspension, aluminium frame
  779 €
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In stock 1 pcs
Order Code: SPTacd085
4.0 2×
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Joiride ultra light 20" medová/černá
Children's Bike - city bike 20" wheel from the age of 7 years, without suspension, meant for recreational use, aluminium frame, frame size: M, pedals included, for children weighing up to 65kg
-5 % off new 267.90 € New 284.90 €
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Unsealed - in stock 1 pcs
Order Code: SPTjoir008
ACADEMY S-GRADE Trail 4 Amber - Children's Bike
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Free delivery
to Alza branch
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ACADEMY S-GRADE Trail 4 Amber
Children's Bike - mountain bike 20" wheel from the age of 6 years, front suspension fork, meant for sports use, aluminium frame, frame height: 240mm, with Plain theme, for children weighing up to 70kg
-6 % off new 884.90 € New 949 €
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Unsealed - in stock 1 pcs
Order Code: SPTacd103
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Volare Barbie 12", pink CB
Children's Bike - city bike 12" wheel, for girls, without suspension, meant for recreational use, steel frame, frame height: 200mm, for beginners, balance wheels and mudguard, for children weighing up to 60kg
-7 % off new 90.90 € New 98.57 €
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Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Order Code: SPTxacr764
5.0 2×
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Joiride ultra light 24" medová/černá
Children's Bike - city bike 24" wheel from the age of 10 years, without suspension, meant for recreational use, aluminium frame, frame size: M, pedals included, for children weighing up to 80kg
-5 % off new 320.90 € New 337.90 €
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Unsealed - in stock 1 pcs
Order Code: SPTjoir011
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ACADEMY S-GRADE Trail 4 R Space
Children's Bike - mountain bike from the age of 6 years, front suspension fork, aluminium frame
-35 % off new 511.90 € New 799 €
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As good as new - in stock 1 pcs
Order Code: SPTacd122
5.0 5×
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Academy Grade 4 20-8S Microshift Blue
Children's Bike - city bike 20" wheel from the age of 6 years, without suspension, aluminium frame, frame height: 290mm, pedals included, for children weighing up to 50kg
BLACK FRIDAY -23 % 373.90 € 489 €
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In stock
Order Code: SPTacd005
Olpran Helix boy black/sea green 24" - Children's Bike
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Free
delivery
5.0 2×
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Olpran Helix boy black/sea green 24"
Children's Bike - city bike 24" wheel, front suspension fork, meant for recreational use, steel frame, frame size: M, with Plain theme, for beginners, pedals included, for children weighing up to 70kg
BLACK FRIDAY -18 % 194.90 € 239 €
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In stock
Order Code: SPTolp532
5.0 9×
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Academy Grade 3 16-1S Red
Children's Bike - city bike 16" wheel from the age of 4 years, without suspension, aluminium frame, for children weighing up to 30kg
BLACK FRIDAY -24 % 325.90 € 429 €
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In stock
Order Code: SPTacd003
5.0 5×
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Academy Grade 4 20-8S Microshift yellow
Children's Bike - city bike 20" wheel from the age of 6 years, without suspension, aluminium frame
BLACK FRIDAY -23 % 373.90 € 489 €
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In stock
Order Code: SPTacd072
5.0 4×
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Dino Bikes 814 14"
Children's Bike - city bike 14 " wheel from the age of 4 years, without suspension, meant for recreational use, steel frame, with Plain theme, for beginners, pedals included and balance wheels, for children weighing up to 45kg
BLACK FRIDAY -11 % 85.01 € 95.52 €
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In stock at the supplier's
Order Code: SPTxacr333
5.0 5×
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Academy Grade 4 20-8S Microshift ocean
Children's Bike - city bike 20" wheel from the age of 6 years, without suspension, aluminium frame
  489 €
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In stock 1 pcs
Order Code: SPTacd070
In the category Kids' Bicycles on Alza.sk, we currently have a total of 204 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.
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