The size of the bike is a critical factor in the comfort, confidence, and safety of a child. The right fit bike will result in easier learning and better developed balance and control. This tutorial divides the kids bike size chart into an easily understandable form and demonstrates the way to select the correct one according to height and age, the size of the wheels, and the style of riding.
You can use this resource to either compare a kids bike sizes chart, find a bike size chart for kids, or find the best kids bike size chart by age and height, as it has all the necessary information to enable you to settle on the correct setup.

Why Bike Size Matters for Kids
Children are fast-growing, and an improper frame or wheel can cause riding to be unsafe or uncomfortable. An appropriate bike size chart kids makes it easier to learn to ride, brake, and have better posture. Parents use many bike size chart by height kids since their height is the most precise in selecting a bike.
The size used for kids is not the frame size but the size of the wheels. Once you have gone through the process, you can fine-tune the fit using both the wheel size and the approximate bike frame size chart.

Kids Bike Size Chart by Height
Below is the ultimate kids bike size chart by height, covering toddlers to early teens:
|
Child Height |
Wheel Size |
Age Range |
Notes |
|
85–100 cm |
10–12 inch |
2–3 years |
Best for first balance bikes |
|
95–110 cm |
12–14 inch |
3–4 years |
The size that should be used by early riders. |
|
105–120 cm |
14–16 inch |
4–6 years |
Good for the self-assured beginners. |
|
115–130 cm |
16–18 inch |
5–8 years |
Favored by school-going riders. |
|
125–140 cm |
20 inch |
7–10 years |
Most common “8 year old bike size” |
|
135–150 cm |
24 inch |
9–12 years |
Fits the youths who are now moving over to small adult bikes. |
|
145–160 cm |
26 inch |
11+ years |
Suitable for early teens or shorter adults |
This kids bike size chart by height allows one to find the size of the wheel in minutes; however, it is always necessary to check the standover clearance and the reachability of the handlebars so that it can be comfortable.

Kids Bike Size Chart by Age and Height
Age estimates can be used to assist in the purchase of gifts, but height is the main measure. Under a kids bike sizes chart, best when compared with the inseam of the child and their experience of riding a bike.
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Ages 3–5: 12–14 inch bikes
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Ages 5–7: 16–18 inch bikes
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Ages 7–10: 20 inch bikes
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Ages 10–13: 24 inch bikes
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Ages 13+: 26 inch bikes

Kids Mountain Bike Size Chart
When you are riding a trail or a path in the park with your child, you should consider a slightly larger wheel with a good grip and stability. A specific kids mountain bike size chart allows superior maneuvering over the rough ground.
|
Height |
MTB Wheel Size |
Notes |
|
115–130 cm |
16–18 inch |
Good in the initial trail skills. |
|
125–140 cm |
20 inch MTB |
Great for beginners on real trails |
|
135–155 cm |
24 inch MTB |
Most all-purpose size among young riders. |
How to Measure Bike Length for Height
To achieve the appropriate overall fit:
-
Measuring the inseam of the child when he is standing on his/her feet.
-
This should be compared to the standover height of the bike.
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Make sure that the child is able to stand on both feet.
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Check reach: the arms are not to be held strained.
The question that parents usually consider is what size push bike do I need?- same thing with balance bikes; the inseam method is used.

Best Bike Sizes for Older Kids & Teens
Once the children are bigger than 20" and 24" bikes, they can switch to teen and shorter-adult types of bike models. The size of the wheel is also not of great importance at this point, except overall frame geometry, saddle height, and reach. Those between 145-165 cm tall will tend to be most at ease on short city bikes, step-through models, or lightweight fold-up models.
The following are natural age-specific examples of bikes that fit older children and teenagers who are already confident in riding and up to the height.
ENGWE P20 — Compact Folding Bike for Confident Young Riders
The ENGWE P20 is a good bicycle to use by teens who are 155cm–190cm tall due to its adjustable seatpost, upright geometry, and also its lightness. Its torque-sensor system provides smooth, predictable acceleration to its developing riders.
The carbon belt drive does not require any maintenance, so it is an option that can be considered for use in school or school commutes. This ENGWE ebike model is the best to be used by older children, as portability, clean use, and a stable ride are mandatory in their daily commute.
Key Specs
- Rider height range: 155–190 cm
- Weight: 18.5 kg (ultra-light)
- Motor: 250W rear hub, 42 Nm torque
- Range: Up to 100 km
- Folded size: 90 × 42 × 62 cm


Aventon Pace 350 — Teen-Friendly Urban Cruiser
Another good choice is the Aventon Pace 350, which is available in the same size range and is an upright bike, being simple to ride with fewer needs for a child of this age.
It is a transitional one, though more minimalist, as it has a less powerful frame and mild power support. The model is suitable for teenagers who desire a simple urban bike with no complicated characteristics.
Key Specs
- Rider height range: 152–183 cm
- Motor: 350W hub motor
- Weight: 20.8 kg
- Maximum pedal assist speed: 20 mph (32 km/h)
- Frame style: Easy to carry, upright

ENGWE L20 — Comfortable Step-Through for Taller Teens
ENGWE L20 suits teen riders with 5'0 to 6'0 in height, which has a more relaxed ride position with large 204.0 tires, making it more stable. The step-through uniqueness is easy to install and handle, particularly for the teens who want a relaxed, confident ride.
It is also fit for going to school or over terrains as it has a long range and a comfortable suspension. A comfortable geometry of the ENGWE L20 was valued by teens, who require a smooth and predictable ride, particularly on uneven roads.
Key Specs
- Rider height range: 152–183 cm
- Range: Up to 140 km
- Motor torque: 50 Nm hub drive
- Fat tires: 20 × 4.0" for stability
- Max load: 120 kg


Conclusion
A correctly adjusted bike will allow children to ride with increased confidence, increased balance, and reduced safety hazards. Wheel and frame size match the appropriate height so that they remain comfortable as they increase in size, be it riding on to have fun, commuting, or to discover new trails.
Frequently Asked Questions
What size bike does an 8-year-old need?
A majority of 8-year-olds are adequately accommodated on a 20-inch bike, although height is the best indicator. The children who are 125-140 cm will usually be most at home with a 20-inch diameter wheel. Before making a purchase, always test the standover height and test whether they can balance and be able to brake without any difficulty.
How do I know if a kids' bike fits properly?
A bike should be the right fit when a child can place both feet on the ground, handle the handlebars with the right position, and use the brakes without any difficulty. When standing over the frame, it must have some clearance of a few centimeters. The ultimate test is test riding.
Can a child use a bike that’s too big?
A bicycle that is oversized bicycle is difficult to steer and hard to stop. Children will have a problem with regulating their weight and height, which puts them at risk of falls. Always fit based on a bike size chart by height kids in order to be safe and comfortable.
Are mountain bikes good for kids?
Yes, if sized correctly. A kids mountain bike size chart guarantees the appropriate wheel diameter and standover height. Trail-ready bikes have improved traction and suspension, thus enabling children to ride with confidence along uneven trails.
What size bike is best for teenagers?
Teen riders typically use 26-inch wheels or mini-adult frames, depending on height. Products such as ENGWE electric bikes can suit self-confident, mature teenagers who meet the manufacturer's height and safety criteria.






