- Fast delivery
- International delivery
- 8.9/10 customer reviews
- 2-year warranty
- Webshop Trustmark
Alpina Trial Boys Bicycle 20" Brake Hub - Deep Red Matt
- EAN 8719461060257
- Brand: Alpina Bikes
- Product Model: 868979
Children are generally taught to ride a bike at an early age.
The right size bicycle allows for a comfortable and safe riding position for children and teens, and stimulates maximum performance of the muscles.
Aside from being less tiring and preventing overexertion of the knees, the right size bike encourages regular bike use and cycling in general.
This size is usually based on the wheel diameter.
![]() |
|||
Children's Bicycle Size Chart | |||
Age |
Clothing Size |
Approximate Length |
Recommended |
2-4 | 98-104 | ≈95 cm | 12 inch |
3-5 | 100-106 | ≈100 cm | 14 inch |
4-6 | 104-110 | ≈105 cm | 16 inch |
5-7 | 110-116 | ≈110 cm | 18 inch |
6-8 | 116-122 | ≈115 cm | 20 inch |
7-9 | 122-128 | ≈122 cm | 22 inch |
8-12 | 128-140 | ≈130 cm | 24 inch |
10-14 | 140-152 | ≈145 cm | 26 inch |
This sizing chart for children's bicycles is based on age and length.
Not everyone is the same length at a certain age, so it’s advisable to determine the bicycle size based on length.
The most important factor in determining the right bike size, is the inseam length.
Body Length |
Inseam Length |
Recommended Bike Size | ![]() |
120-140 cm | < 52 cm | 16 inch | |
52-75 cm | 20 inch | ||
< 74 cm | 24 inch | ||
140-160 cm | < 62 cm | 20 inch | |
62-80 cm | 24 inch | ||
> 80 cm | 26 inch | ||
> 160 cm | < 74 cm | 24 inch | |
> 74 cm | 26 inch |
Most children that are 120 to 140 cm tall can ride a 20 inch bike, while children between 140 and 160 cm tall can ride a 24 inch bike.
A 26 inch bike is generally suitable for teenagers who are over 160 cm tall.
The right frame height is also very important:
it is the first step to finding the correct riding position.
A bicycle frame that is too small or too large can lead to limited height adjustment options, which in turn may lead to an inconvenient height difference between the saddle and handlebars.
Use the inseam length to determine which frame size is right for you.
You can do this by measuring the inside of your leg, from the top of the thigh down to the floor.
Adult Bicycle Size Chart | ![]() |
Approximate Inseam Length |
Recommended Frame Size |
≈ 66 cm | 43 cm |
≈ 74 cm | 48 cm |
≈ 77 cm | 50 cm |
≈ 78 cm | 51 cm |
≈ 80 cm | 52 cm |
≈ 83 cm | 54 cm |
≈ 85 cm | 55 cm |
≈ 86 cm | 56 cm |
≈ 89 cm | 58 cm |
≈ 91 cm | 61 cm |
≈ 93 cm | 65 cm |
Choose the frame size closest to your results.
When in doubt, it’s best to pick the smaller frame size.
If you have any questions about determining the right bicycle size, you can always give us a call or send us an e-mail.
Alpina produces awesome children’s bikes for boys and girls aged 3 to 12 years old.
Quality and safety are of paramount concern to Alpina.
And since children want their bicycles to look cool and reflect their personality, Alpina also pays a lot of attention to the concept and design of its children's bicycles.
When your child is learning how to ride a bike, it’s important to have the right children’s bicycle: high-quality materials poured into a modern and safe design.
Alpina understands the need for safety and fun and equips all Alpina bicycles with excellent brakes and lights.
If you enter your email address, you will be automatically notified via email when this product is back in stock.
- Over 120.000 products
- International delivery
- Fast service with a rating of 8.9/10
- Over 3 million satisfied customers
- A 30-day cooling-off period and 2-year warranty
Our team of enthusiastic colleagues is ready to help you.
+31 (0)70 - 300 00 44helpdesk@hollandbikeshop.com
![Do you have any questions? Do you have any questions?](/template_files/images/contact-img.jpg)
- Fast delivery
- International delivery
- 8.9/10 customer reviews
- 2-year warranty
- Webshop Trustmark