What Size Bike for a 4 Year Old? Baby & Kids

Your kids want to ride a bike and you may notice this craziness for a couple of days when you are outing in the countryside. Riding bike is not just fun or pleasure or waste of time. Riding bike has so many benefits on kid’s life. It has positive impact on physical activity which stops early obesity. It helps kid’s focus on study more as they can take physical exercise which also nourishes brain and mental development. Most importantly if they find more interest, your kids are going to win a competition.

There are so money bikes in the market which may be so attractive, heavy and eye catching bikes. But those bikes are not fit for your kids so many reasons and it is important to know what size bike for a 4 year old. Your kids may get more fun when this bike is light in weight and easy to handle. In spite of being light in weight, it should be durable because kids hand may be a little bit unsteady to handle safely.

To buy a bike for your kids, it is a must to study which bike is best for 4 years old and safe for them. In case you miss to study, you may find a bike useless, unsafe and unnecessary expenditure of money after buying. So this is the most important issue that may make perfectly fit.

What size bike for a 4 year old?

Different child are different in term of height and weight. A 3 year old kid’s bike is not perfect for a 4 years old kids. Kid’s height and wheel size matter to ensure safety and security. Perfect measurement can make biking more fun and enjoyable. There are different size of wheel in the bike like 12”, 14”, 16” 20” and 24”.

There is another issue that is to measure their inseam according to their body. The best measurement could be your kid’s inseam should be as long as the seat height which ensures stability and safety while riding a bike. Here you may know some measurement what size bike for a 4 year old kid.

Additionally, the most important issue is your kids feet should touch the ground so easily and perfectly to take full control even if the bike is in a minimum speed. This is the best learning when your kids also are going to learn biking for the first time.

Wheel Size Age Height Inseam
12” 2-4 2’10” to 3’4” 14-17/35-42 cm
14” 3-6 3’1” to 3’7” 16-20/40-50cm


This table shows that 12” and 14” proportionally fit for the 4 years old kid. The bike manufacturers manufacture bike with this measurement but this one bike also may not be fit for your kids.

Best Bike for a 4 Year Old

In that case, the best advice for you is to take your kid in the bike store to make sure you are going to buy perfect bike in terms of size, weight and other issues. If your kids feel comfort and easy to handle, it may be perfect choice for buying a best bike for your kids. So now, you can go forward with the best bike for a 4 year old.

Woom 2 Pedal Bike 14”, Ages 3 to 4.5 Years:

Woom 2 Pedal Bike

The cost of this bike is $339 that may make you a little bit unhappy. But this bike is so popular in the market as best bike for a 4 year old kid. This bike is perfect match for those kids. The weight of this bike is not heavy which the important consideration for the kids is.

WOOM 2 is only 11.7lb. The bike’s inseam ranges from is only 16” to 19” which may be fit for the 4 year old. Another fact to consider is this tire size 14” that provides natural balance and coordination while biking with this bike.

More importantly, frame design, geometry and safe brake design have made this bike unique to choose as first priority. Which is why this is one of the best bike for 4 year old.


  • Natural balance
  • lightest pedal
  • High end components
  • Right hand brake for safety
  • Different color


  • Heavy upright for fast riders

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Woom 3 Pedal Bike 16”, Ages 4 to 6 Years:

WOOM brand is one of the leading brand in the world in manufacturing bike for the kids. For this, we have recommended the first one as WOOM and 2nd is also WOOM. WOOM 2 and WOOM 3 are dominating the market and has immense popularity from the customer.

WOOM 3 Pedal Bike

For the new learners this bike has been considered as one of the best bike because the frame of this bike is made of aluminum and it is less weight and easy to carry or pull. Kids from 4 to 6 years old can enjoy riding this bike. Safety feature of this bike is really appreciable. Front and rear hand V-Brake with freewheel feature is completely designed by the needs of children 4 years old. However kids can take any one from best 5 colors like red, blue, green, purple and yellow.


  • Highly designed with the need of children
  • High-quality


    • High Price

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RALEIGH New Jazzi 12 Complete Kids Bike:

This bike is one of the perfect match for the kids for various reason. You may choose this bike for your kids. Kids can fit the bike as inseam ranges from 18” to 21”. Luckily this bike has training wheel to take full control and coordination when bikes goes out of control. The weight of the bike is also light and it is 17.3lb. When you require for 12” tire, this bike is going to meet your requirement.

RALEIGH New Jazzi 12 Complete Kids Bike

Surely your kids are going to enjoy biking with this bike as this bike is well build and ensures comfort as well as safety according to body position for the riders. Raleigh Jazzi/MXR 12 can grab the attention of the kids as this bike is funny and has different colorful designs. This bike has also sturdy build.


  • Upright body fit that meets the requirement of new riders
  • Sturdy build
  • Affordable price
  • Colorful design


    • Coaster brake but no hand brake
    • Heavy for the new riders

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Raleigh Bikes Lily 16 Kids Mountain Bike:

Low in price but this bike has so many good features that can catch the attraction of the girls from 3 to 5 years old. This bike has designed well for the needs of 3-5 years old girls. Kids can ride this bike beside the park that can look so beautiful. This bike is made of aluminum and logically it is less weight. So kids can pull and move any way during learning which can be so important issue while learning on how to ride a bike.

Raleigh Bikes Lily 16 Kids Mountain Bike

Padded seat and soft PVC Grip can make riding more comfortable and this company has taken this into consideration. Brakes are also strong enough to stop the bike during running. Most of the parents who are already thinking to buy a bike for your girl who is 3-5 years can make right decision to have this one. Fortunately this bike for girls may be model for other girls.


  • Fork allows for upgrades
  • Good quality of tiers
  • Cheap at price


  • Seat hard for long rides

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Cleary Bikes Gecko 12 in Single Speed Freewheel Bike:

The best designed and good looking bike is Cleary Gecko and it is one of the best bike for 4 year old boy. This bike can be fit from 2.5 years old to 4 years old. The Gecko is 12” which can be best choice for the kids who want to learn and ride bike from the beginning.

Cleary Bikes Gecko

Some more features of this bike are easy to pull brake levers, a freewheel option. Additionally, this bike weighs only 15.8lbs with coaster and 13lbs with freewheel option. Seat height is another important factor to consider giving you 15” to 18”. It is so important to know that there is also optional seat post.

Kids don’t understand how to use a bike to sustain for longer time. Durability is another issue that might catch the parents of the young bikers as it is more durable.


  • Eye catching design
  • Fitted for 4 years old kids
  • Freewheel option
  • Durability


  • No quick-release
  • No steering limiter

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Pello Children’s Bike – Romper

Pello Romper is the smart choice for your little kids because it is perfect match. You are mountain biking lover and in the same way your kids will follow this path. Pello Romper can be best choice when you have a plan to ride on mountain. The sleek design and colorful design will not only help your kids bike independently but also it is safer compared to other bikes in the market.

Pello Children's Bike

The child who knows better biking will tell that he want this bike. The appropriate geometry and high quality of the components have made this bike unique in the market. The minimum seat height is not so high and it is only 18.5”. Weight is only 15 pounds and wheel size is only 14” that meets the requirement of the 4 years old kids.


  • Eye catching looking
  • Kid’s friendly design
  • High quality design


    • No dual handbrakes
    • One color orange

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PREVELO Alpha One 14-inch Kids’ Bike:

Prevelo Alpha is awesome for best bicycle for 4 year old boy. This bike may be costly but there are some unique features of this bike. This bike is perfect for the kids for 4 years old when inseam ranges from 15.6” to 17.5”. The bike is also light in weight and it is only 14.4lb. There is no training wheel and it is not necessary to learn balancing while riding a bike.

PREVELO Alpha One 14-inch Kids' Bike

The tire size is 14” which is the perfect measurement of the kids who are 4 year old. A top-notch and best bike is a bike that can meet the needs for the beginners also. The lower rise handlebars and lightweight of this bike is smart and comfortable to ride. More importantly this bike can make your kids aggressive and adventurous and expert in biking.


  • Less Weight due to Lower size handlebars
  • Responsive
  • Easy carry
  • Dual handbrakes
  • Better balance for lower center of gravity
  • Superior quality of components


    • Coaster brake

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Z3 Eagle Carbon Aero Road Bike

Young rider’s best choice is Z3 Eagle Carbon Aero Road Bike and this bike has been designed for the needs of new learners. New leaners can easily know how to pedal by setting pedal slightly compared to other common bikes. The best feature of this bike is safety concern and this pedal setting helps to prevent possible accident.

Z3 Eagle Carbon Aero Road Bike

However, this bike is fit for the kids where inseam ranges from 17” to 19” but this range may vary when inseam ranges from 15” to 17”. Young riders can pull and move this bike very easily because this bike also is designed with less weight that 15lb. on the other hand, there are training wheels which will surely help the new learners to keep a good balance during learning. Surely this is best bike for 4 year old kids.

The bike is also designed with high quality of components that make this bike durable and sustainable.


  • Learning pedal easier
  • Available in local store
  • High quality training wheels
  • 2.3 tiers for stability


  • Coaster brake but no hand brake
  • High Price

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Bottom Line:

Riding a bike has got much popularity among the people who want to see the world at own effort and also getting obese day by day. When they have a bike, they can go far way and take physical activity. It sounds well for the health. You are a perfect and expert biker and this trends may catch your next generation. Now kids are so excited when they see their peer are riding a bike.

So you may notice this from your child and may decide to give a bike on any occasion. But buying a bike is not so easy. You must know a lot of factors which matter for the bikers. What size bike for a 4 year old, weight, brakes, tire and many other things are so important to know. It may be better to know the factors at first and take your child to the bike stores to make sure a perfect match between a kid and a bike.