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The Ultimate Kids' Bike Size Chart by Age and Height

Finding the right bike for your child can be confusing. Every kid grows at a different speed, and so their bike needs to match their height and age. A bike that’s too big or too small can make riding hard and unsafe. 

This kids bike size chart will help you understand what bike fits best for your child’s size and comfort. But before you buy any bike, you must know how to pick the right size using a simple size chart.

What is a Kids Bike Size Chart?

A kids bike size chart shows the best bike size for your child according to their height and age. It helps you see what wheel size or frame size suits your kid so they can ride easily and safely. Most charts include age, height, and tire size. By following a bike size chart for kids, you can make sure your child can touch the ground with their feet while sitting on the seat, which means the size is perfect.

Kids Bike Size Chart by Age and Height

Below is a simple guide that helps you choose the right bike size for your child according to both age and height.

Age (Years)

Height (Inches)

Wheel Size (Inches)

2–3

34–39

12”

3–4

39–45

14”

4–5

39–46

16”

5–8

45–54

20”

8–11

54–61

24”

11+

61 and above

26” or more

When you look at this kids bike size chart by height, focus on height more than age. Kids grow fast, so a taller child might need a bigger bike earlier.

Kids Bike Size Chart by Age and Height

Kids Mountain Bike Size Chart

A kids mountain bike size chart helps you match your child’s height with the right wheel size. If your child is growing fast, choose a bike slightly bigger so they can use it longer. Always check the seat height and handle reach before buying.

Age (Years)

Height (cm)

Wheel Size (Inches)

Bike Type Suggestion

4 – 6

100 – 115

16”

Light mountain bike with simple gears

7 – 9

115 – 130

20”

Small mountain bike, front suspension

10 – 12

130 – 145

24”

Mid-size mountain bike with gears

13+

145+

26” – 27.5”

Full-size kids mountain bike

Kids Mountain Bike Size Chart

Bike Frame Size Chart

A bike frame size chart helps you pick a frame that fits your child’s height. A bike that’s too big or too small can make riding unsafe. The right frame size keeps the balance easy and makes riding more fun.

Rider Height (cm)

Frame Size (inches)

Suitable For

95 – 110

8” – 10”

Toddlers and small kids

110 – 125

10” – 12”

Young kids (5–7 years)

125 – 140

12” – 14”

Kids (8–10 years)

140 – 155

14” – 16”

Pre-teens and early teens

Bike Frame Size Chart

Bike Size Chart for Kids

The bike size chart for kids shows the right bike wheel size for each age and height group. Choosing the correct size helps your child ride safely and confidently without feeling too stretched or cramped.

Age (Years)

Height (cm)

Wheel Size (Inches)

Type of Bike

2 – 4

85 – 100

12”

Balance or push bike

4 – 6

100 – 115

14” – 16”

Small pedal bike

7 – 9

115 – 130

20”

Junior bike with gears

10 – 12

130 – 145

24”

Larger kids bike

13+

145+

26”

Teen bike or small adult bike

Find Your Perfect Bike Fit

Choosing a new bike is exciting, but getting the right size is crucial. The wrong fit not only affects comfort but can also be a safety hazard. Use this simple calculator below—just enter your height and inseam to get a quick estimate of the right frame size for you, making your choice easier.

Bike Size Calculator



Kids Electric Bikes 

Here are a few of the ebikes you can buy for your kid. Choose one that meets your child's riding needs.

Woom UP 5

The woom UP 5 is an electric mountain bike made for kids about 7 to 11 years old. It features a lightweight aluminum frame, front suspension, and disc brakes to navigate rough terrain safely. The bike gives pedal-assist with three support levels, helping kids ride up hills more easily. 

Woom UP 5

Hiboy BK1 Balance Bike

The Hiboy BK1 is for very young riders, about 3 to 5 years old, learning balance and control. It has a small 100W motor and can go up to ~ 9 mph, enough for fun but not too fast. The seat height adjusts to grow with the child, and it weighs just ~ 8 kg, so kids can lift or manage it.

Hiboy BK1 Balance Bike

Razor MX-350 Dirt Rocket

The Razor MX-350 is a ride-on electric dirt bike for older kids (often 8+), especially those who like off-road fun. It has large, knobby tires and a steel frame built in motocross style. It runs on a 24 V battery system and can reach speeds around 14 mph (22 km/h), with about 30 minutes of ride time on high speed. 

Razor MX-350 Dirt Rocket

ENGWE Electric Bikes You Can Buy

If you are looking for an ebike that is safe, comfortable, and easy to ride. Go for ENGWE ebikes, which offer great features.

ENGWE E26

The ENGWE E26 is a strong and stylish electric bike made from durable 6061 aluminum alloy. It has a 250W brushless motor and a 48V 16Ah removable battery that can go up to 140 km in PAS mode.

The 26x4.0-inch fat tires make it easy to ride on sand, snow, or rough roads. It has hydraulic disc brakes, a Shimano 7-speed system, and an LCD display to show your speed and battery. 

ENGWE E26

250W 140 km Dual Suspension All-Terrain E-bike

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ENGWE P20

The ENGWE P20 is a lightweight electric bike that is made from 6061 aluminum alloy material. It has of 250W motor and 42Nm torque. This e-bike is foldable, and it has a strong battery that works well for hours. You can use this electric bike for urban rides.

ENGWE P20

18.5KG Torque Sensor Folding Urban Electric Bike with Belt Drive

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ENGWE P275 ST

This electric bike is made from strong 6061 aluminum alloy and powered by an Ananda 250W mid-drive motor with 70 Nm torque for smooth and powerful rides. It has 27.5x2.4 spoke tires and a Shimano 9-speed system for easy gear shifting on all kinds of roads. 

ENGWE P275 ST

250W Ananda Mid-drive Motor 70NM Torque Step Thru Urban E-Bike

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Types of Kids Bikes

Every child has a different riding style. Some just start learning, while others already enjoy mountain-style riding. Here are some main types of kids bikes:

Balance Bikes

These bikes are for very young kids who are learning to balance. They have no pedals. Children push with their feet, which helps them gain confidence and control.

Pedal Bikes

These are the next step after balance bikes. They come with or without training wheels. The pedals teach proper riding, and once your child is ready, you can remove the side wheels.

Kids Mountain Bikes

The kids mountain bike size chart helps you choose bikes for children who love off-road riding. These bikes are strong, have better tires, and give your child more control on rough ground.

Folding or Electric Kids Bikes

For families who travel or live in small homes, folding or small ENGWE electric bike models can be fun choices. These are compact and easy to carry.

Types of Kids Bikes

Why Choosing the Right Size Matters

Choosing the right bike size chart kids is very important. If a bike is too big, your child might lose balance. If it’s too small, their knees can hit the handle. A perfect size helps them ride comfortably, stay safe, and enjoy cycling more.

Many parents also use the bike size chart by height kids to upgrade bikes as their children grow. This way, you avoid wasting money on the wrong size.

What Features to Look for Before Buying

When buying a bike for your child, keep a few features in mind. These points will help you make a smart and safe choice.

  • Proper Wheel Size: Always match the wheel size with your child’s height using the bike size chart by height.
  • Adjustable Seat and Handlebars: Choose a bike with an adjustable seat so you can raise it as your child grows.
  • Light Frame: A light bike frame size chart helps you understand what frame your child can handle easily. Heavy bikes can be hard for small kids to move.
  • Strong Brakes: Make sure the brakes work smoothly. Small hands should easily press them.
  • Safety Gear Ready: Always buy a helmet and pads along with the bike.

These small features make riding safe and fun.

Find the Right Electric Bike Today

Before buying, take a look at your child’s height and use the kids bike size chart by height and age above. It only takes a few minutes, but it helps you choose the perfect bike that fits your child’s body and comfort.

Then decide which electric bike suits your child's height, size, and weight. Explore ENGWE ebike models today.

Learn More

Conclusion

As a parent, if you want to buy an electric bike for your kid, you need to keep a few things in mind. That's not all about design, comfort, and safety; you also have to consider our child’s age, height, and the type of bike that suits them.

You should also check the bike’s seat size and other features to make sure your child doesn’t face any problems later. The right bike size helps your child stay balanced, confident, and happy while riding.

FAQs

What size bike should an 8-year-old ride?

An 8-year-old bike size usually fits a 20-inch wheel, but always check your child’s height first.

How do I know if my child’s bike is the right size?

If your child can touch the ground with their feet while sitting on the seat, it’s the correct size.

What size push bike do I need for a 5-year-old?

A 16-inch bike usually works best for kids aged 4 to 5 years.

Do electric bikes like ENGWE make good kids bikes?

Yes, small models like the ENGWE T14 can suit older kids who ride safely.

Is height or age more important when choosing a bike?

Always use height first. The bike length for height gives a more accurate match than age.

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