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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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256 Results
ACADEMY S-GRADE Pump 5 Plum - Children's Bike
Free delivery
Alzaboxes and stores
ACADEMY S-GRADE Pump 5 Plum
Children's Bike - Dirt jump bike 24" wheel from the age of 7 years, front suspension fork, aluminium frame
New arrival 20,890,-
Buy
In stock 1 pcs
Order Code: SPTacd117
ACADEMY S-GRADE Pump 4 Frost
Children's Bike - Dirt jump bike 20" wheel from the age of 6 years, front suspension fork, aluminium frame
New arrival 19,590,-
Buy
In stock 1 pcs
Order Code: SPTacd116
ACADEMY S-GRADE Pump 4 Plum
Children's Bike - Dirt jump bike 20" wheel from the age of 6 years, front suspension fork, aluminium frame
New arrival 19,590,-
Buy
In stock 1 pcs
Order Code: SPTacd115
Olpran Ultra light 16" pearl green/crystal blue - Children's Bike
Free
delivery
4.4
Olpran Ultra light 16" pearl green/crystal blue
Children's Bike - children's bike 16" wheel from the age of 5 years, without suspension, meant for recreational use, aluminium frame, with Without theme theme, light weight, pedals included, for children weighing up to 50kg
Buy with code ALZADNY30 The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Získejte slevu 30% s kódem ALZADNY30. 5,383,-
7,690,-
Buy
On the way 1 pcs
Expected 19/06/2026
Order Code: SPTolp597
Olpran Formica girl pink/grey 24" - Children's Bike
Free
delivery
4.3
Olpran Formica girl pink/grey 24"
Children's Bike - children's bike 24" wheel, front suspension fork, meant for recreational use, steel frame, frame size: M, with Without theme theme, for beginners, pedals included, for children weighing up to 70kg
6,890,-
Buy
On the way > 5 pcs
Expected 19/06/2026
Order Code: SPTolp529
Olpran Formica girl black/pink 24" - Children's Bike
Free
delivery
4.3
Olpran Formica girl black/pink 24"
Children's Bike - children's bike 24" wheel, front suspension fork, meant for recreational use, steel frame, frame height: 388mm, frame size: M, with Without theme theme, for beginners, pedals included, for children weighing up to 70kg
6,890,-
Buy
On the way > 5 pcs
Expected 19/06/2026
Order Code: SPTolp528
Olpran Culex 24" blue/red ALU - Children's Bike
Free
delivery
3.5
Olpran Culex 24" blue/red ALU
Children's Bike - mountain bike 24" wheel, full suspension, meant for recreational use, steel frame, frame size: S, with Without theme theme, pedals included, for children weighing up to 100kg
7,490,-
Buy
On the way > 5 pcs
Expected 19/06/2026
Order Code: SPTolp621
Olpran Culex 24" black/red ALU - Children's Bike
Free
delivery
3.5
Olpran Culex 24" black/red ALU
Children's Bike - mountain bike 24" wheel, full suspension, meant for recreational use, steel frame, frame height: 330mm, frame size: S, pedals included, for children weighing up to 100kg
7,490,-
Buy
On the way > 5 pcs
Expected 19/06/2026
Order Code: SPTolp620
Olpran Agilis boy 20" dark green/orange - Children's Bike
Free
delivery
Olpran Agilis boy 20" dark green/orange
Children's Bike - children's bike 20" wheel, front suspension fork, meant for recreational use, steel frame, frame size: M, pedals included, for children weighing up to 60kg
4,790,-
Buy
On the way > 5 pcs
Expected 19/06/2026
Order Code: SPTolp525
Olpran Vipera 20" mint/sand - Children's Bike
Free
delivery
5.0
Olpran Vipera 20" mint/sand
Children's Bike - mountain bike 20" wheel, full suspension, meant for recreational use, steel frame, frame height: 280mm, frame size: S, with Without theme theme, pedals included, for children weighing up to 70kg
5,990,-
Buy
On the way > 5 pcs
Expected 19/06/2026
Order Code: SPTolp615
Olpran Gryllus boy grey/petrol/red 24" - Children's Bike Free
delivery
3.0
Olpran Gryllus boy grey/petrol/red 24"
Children's Bike - children's bike 24" wheel, front suspension fork, meant for recreational use, steel frame, frame size: M, with Without theme theme, for beginners, pedals included, for children weighing up to 90kg
Buy with code ALZADNY40 The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Get 40 % off with code ALZADNY40. 4,194,-
6,990,-
Currently Unavailable
Order Code: SPTolp536
5.0
Academy Grade 5 24-8S Microshift Red
Children's Bike - children's bike 24" wheel from the age of 8 years, without suspension, aluminium frame, frame height: 380mm, pedals included, for children weighing up to 60kg
13,190,-
Currently Unavailable
Order Code: SPTacd009
Olpran Anas 20" orange - Children's Bike Free
delivery
5.0
Olpran Anas 20" orange
Children's Bike - mountain bike 20" wheel, without suspension, meant for recreational use, steel frame, frame height: 330mm, frame size: S, with Without theme theme, pedals included, for children weighing up to 70kg
Buy with code ALZADNY40 The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Get 40 % off with code ALZADNY40. 2,754,-
4,590,-
Currently Unavailable
Order Code: SPTolp611
Olpran Anas 20" green - Children's Bike Free
delivery
5.0
Olpran Anas 20" green
Children's Bike - mountain bike 20" wheel, without suspension, meant for recreational use, steel frame, frame height: 330mm, frame size: S, with Without theme theme, pedals included, for children weighing up to 70kg
Buy with code ALZADNY20 The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Získejte slevu 20 % s kódem ALZADNY20. Klikněte a kód se uplatní automaticky. 3,672,-
4,590,-
On the way > 5 pcs
Expected 19/06/2026
Order Code: SPTolp612
5.0
Academy Grade 5 24-8S Microshift Blue
Children's Bike - children's bike 24" wheel from the age of 8 years, without suspension, aluminium frame, frame height: 380mm, pedals included, for children weighing up to 60kg
13,190,-
Currently Unavailable
Order Code: SPTacd008
Olpran Culex 24" petrol/sand ALU - Children's Bike Free
delivery
3.5
Olpran Culex 24" petrol/sand ALU
Children's Bike - mountain bike 24" wheel, full suspension, meant for recreational use, steel frame, frame height: 381mm, frame size: M, with Without theme theme, pedals included, for children weighing up to 100kg
7,490,-
Currently Unavailable
Order Code: SPTolp619
4.0
Canull XC 221 black/white 20"
Children's Bike - mountain, children's and Cross country / XC bike 20" wheel, front suspension fork, meant for recreational and sports use, aluminium frame, frame size: S, for beginners, with stand, for children weighing up to 60kg, 2023 model
7,490,-
Currently Unavailable
Order Code: SPTolp342
3.9 16×
Canull XC 240 black/white 24"
Children's Bike - mountain and Cross country / XC bike 24" wheel, front suspension fork, meant for recreational and sports use, aluminium frame, frame size: S, for beginners, for children weighing up to 110kg, 2024 model
7,590,-
Currently Unavailable
Order Code: SPTolp338
5.0
Dino Bikes Dinosaur 12"
Children's Bike - children's bike 12" wheel from the age of 3 years, without suspension, meant for recreational use, steel frame, with Dinosaurus theme, for beginners, balance wheels, for children weighing up to 40kg
2,639,-
Currently Unavailable
Order Code: SPTxacr329
5.0
Academy Grade 3 16-1S belt Purple
Children's Bike - children's bike 16" wheel from the age of 4 years, without suspension, aluminium frame, frame height: 26mm, for children weighing up to 30kg
10,990,-
Currently Unavailable
Order Code: SPTacd035
Olpran Vipera 20" blue - Children's Bike Free
delivery
5.0
Olpran Vipera 20" blue
Children's Bike - mountain bike 20" wheel, full suspension, meant for recreational use, steel frame, frame height: 280mm, frame size: S, with Without theme theme, pedals included, for children weighing up to 70kg
4,790,-
Currently Unavailable
Order Code: SPTolp613
5.0
Academy Grade 6 26-8S Mircoshift Olive
Children's Bike - children's bike 26" wheel from the age of 10 years, without suspension, aluminium frame, frame height: 450mm, for children weighing up to 80kg
13,490,-
Currently Unavailable
Order Code: SPTacd010
5.0
Academy Grade 5 24-8S Microshift ocean
Children's Bike - children's bike 24" wheel from the age of 7 years, without suspension, aluminium frame
13,190,-
Currently Unavailable
Order Code: SPTacd076
5.0
Academy Grade 6 26-8S Mircoshift Blue
Children's Bike - children's bike 26" wheel from the age of 10 years, without suspension, aluminium frame, frame height: 450mm, for children weighing up to 80kg
13,490,-
Currently Unavailable
Order Code: SPTacd011
In the category Kids' Bicycles on Alza.cz, we currently have a total of 257 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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