What Size Bike Does a 6 Year Old Need How to Choose

What Size Bike Does a 6 Year Old Need? How to Choose?

Because there are so many sizes and variations that are available for the kids’ bike market, choosing the appropriate bike size for your 6-year-old can seem like a difficult task.

Therefore, it makes sense that parents occasionally choose a size that is either too large or too small, which can make the child’s biking experience less than ideal.

Kids are constantly growing, so by the time you have all of your information and facts prepared, the child would have gotten a little bit taller, which only serves to increase the confusion.

Every time your child is ready for a cute new upgrade, this article will offer a ton of useful resources to help you find the answer.

What Size Bike Does a 6 Year Old Need?

We recommend an 18 or 20 inch bike for a 6 year old kid.

The size should be chosen with the understanding that age is only a general guideline.

When determining bike size, the child’s height is a better indicator.

This is due to the fact that children of the same age can vary greatly in terms of their height and size.

When taking into account growth spurts, a child who is between 43 and 55 inches tall is typically a good fit for a 20-inch bike.

An 18-inch bike is another option because the size difference is not as great and your child might find it to be more comfortable.

But unlike other wheel sizes, 18-inch bikes are not as popular, so it’s possible that there aren’t many brands that target this market.

This is a brand-new segment that aims to close the distance between a 16-inch and a 20-inch bike. Therefore, take a look at an 18-inch model and assess the results.

How Kids’ Bikes Are Sized?

Kids’ bikes, unlike adult bicycles, are categorized based on the size of the wheels. This is due to the fact that kids grow so quickly that the entire bike needs to be changed, rather than just the frame size like adult bikes, including the wheels, geometry, and seat height. After balance bikes, wheels start at 12″ diameter and gradually increase in size to reach 26″ for kids aged 10 years and up.

AgeHeight (Inch)Height (cm)Leg Inseam (Inch)Leg Inseam (cm)Bike Tire Size
22’9″ – 3’1″85-90cm12″ – 14″85 – 90cm10″
3-43’1″ – 3’3″90-100cm14″-17″35-42cm12″
4-53’3″ – 3’7″100-110cm16″-20″40-50cm14″
5-63’7″ – 3-8″110-115cm18″-22″45-50cm16″
6-83’8″ – 4’0″115-120cm20″-24″50-60cm18″
7-94’0″ – 4’5″120-135cm22″-25″55-63cm20″
9-114’5″ – 4’9″135-145cm24″-28″60-72cm24″
11-145’+145cm +28″+72cm+26″

Safety First: Correct Sizing & Its Significance

Your child’s comfort and confidence while riding can significantly increase if they have a bike that is the right size. The most crucial factor in proper sizing is safety. When children are still learning to balance, it helps to be able to touch the ground with your feet to prevent unpleasant tumbles. The handlebars should be high and close enough for kids to comfortably look straight ahead while they are riding. Kids should be seated reasonably upright.

Factors to Look for When Sizing Bikes for 6 Year Olds


The weight of the bicycle can make or break a child’s interest in biking, especially when they are very young, making it the most crucial factor when it comes to children’s bikes.

This is so that a child cannot push an object that can be very heavy in relation to their body weight because their body is still developing.

Many people have a tendency to ignore this aspect as well.

Therefore, a bike made primarily of aluminum that can reduce the weight of the bike will go a long way toward ensuring that the child enjoys biking and will continue to do so.


The bike’s fit is the other factor that might affect a child’s biking experience.

In order to provide the best experience, a number of related sub-aspects must cooperate.

Standover Height

When the young person is standing still over the bike, this height is what is measured.

For the child to feel the most comfortable and confident, there should be at least 5 inches between the bike’s top tube—the tube that connects the saddle to the front fork—and the crotch.

First, determine the child’s inseam height. However, this is not the inseam length of the pants.

Ask your kid to lean against a wall without any shoes on.

When measuring the distance between the crotch and the floor, place a hardcover book in between the legs.

This measurement should be used to determine whether the bike is the right size for the child.


How confident the child would be handling the bike depends in part on the length of the top tube.

The young rider will have to exert more effort to move the bike forward if it is too short and there is inadequate space between the knees and handlebars, particularly at the top of the stroke.

Additionally, control and handling may be problematic if the distance is too great.

Q – Factor

The distance between the two pedals is measured using the Q factor.

This should ideally not be too wide as it can cause the child to exert excessive effort to move the bike due to splaying of the legs and body swaying while pedaling.

What Size Bike Does a 6 Year Old Need How to Choose
What Size Bike Does a 6 Year Old Need? How to Choose?

Height, Age, Or Inseam? What’s Most Important?

The nuances of a proper fit cannot be fully conveyed by bike size charts because they are made to be quickly understood. Because kids of the same age can have drastically different heights and measurements, the situation is even more challenging when it comes to kids’ bikes.

The age of your child is a good place to start, but that’s about it. Even at the same age, boys and girls mature at different rates and have a wide range in height. For instance, not every six-year-old child is riding a bike that is the same size.

The best practice is to take into account your child’s height because bike manufacturers frequently provide model-specific size charts based on height for their own bikes. Additional assurance that you have chosen the correct size comes from the inclusion of inseam measurements.

Isn’t It Best to Try Out Bikes in the Store?

Online bike shopping is increasingly common, even though it’s always preferable to test ride a bike in person rather than look through various models on a website. Not only is online purchasing easier than ever, but it has also often been our only option during the COVID-19 pandemic. Due to high demand and supply chain issues, local bike shops have a low inventory of bikes.

You’re in luck if the kids’ bikes at your neighborhood shop are available! With the assistance of their knowledgeable mechanics, enjoy a test ride. They’ll appreciate it if you bring your child’s measurements so they can quickly focus the search and find the ideal fit. Who doesn’t enjoy taking a test drive in a brand-new two-wheeler?

Does My Child Need Training Wheels?

For young riders who haven’t mastered their sense of balance yet, training wheels can help them gain confidence and a feel for pedaling. These tiny wheels, which are positioned on either side of the rear wheel and are elevated from the ground, serve to stabilize the bike in the event that the rider leans over excessively.

Training wheels are typically removed for riders between the ages of three and five, but children who are more experienced or who are six years old and older can feel free to do so. It’s a personal choice, but I advise trying it without that additional help to gauge their starting skill level.

What to Do If Your Child is in Between Bike Sizes?

Our recommendation is to typically choose the larger size if your child’s measurements fall within the range of two bike sizes on our size chart. Kids, unlike adults, grow quickly, so it won’t be long before they can ride that slightly bigger bike without any modifications. The difference between kids bike sizes is only a few inches, so picking a size larger is acceptable for children who are in between sizes.

Even if your child is squarely in the middle of the height range for a 20″ bike, for example, they can upgrade a bit earlier to a 24″ bike if their coordination and balance levels are high. This can be a fun challenge that enables them to travel farther or faster than they could on their older, smaller bike.

Pick a Bike Based on Current Fit and Future Growth

The most important piece of advice we can give you is to buy a new kid’s bike based on their current measurements while also considering how much they will grow. Even though it may appear that you are juggling two tasks at once, this can aid in your decision-making. Don’t, for instance, purchase a bike that they are currently unable to ride. They might lose interest if they have to wait months before they can ride the new bike properly or comfortably. Remember that they are growing quickly; perhaps they have recently experienced a significant growth spurt and can temporarily settle into a particular bike size.

Tips for Buying a Bike for a 6 Year Old


It can be challenging to bike uphill, especially for younger children. So choosing a bike made of lightweight materials can help your child ride more easily. Additionally, a strong metal that can withstand all of your child’s playdates is what you want.

Look for bike frames made of titanium, aluminum, or carbon steel. According to Seacat, each of these is both portable and strong.


Knowing which brakes your child feels most at ease using is important because different bikes have different braking systems.

Children’s bicycles can have handle brakes, which require you to squeeze a lever to stop, pedal brakes, which require you to pedal backward to stop, or a combination of both (also known as a dual-braking system).

Brand Quality

It might seem excessive to spend a few hundred dollars on a child’s bike, but Seacat asserts that the expense is unquestionably worthwhile. The materials used in a good brand (like the ones mentioned above) are of higher quality, and their durability is increased. These bikes also have a warranty and are expertly put together.

Frequently Asked Questions

Can a 6 Year Old Ride a 20 Inch Bike?

It’s likely that a 20″ bike is the right size for your 6 year old, but it depends on their height and measurements. A 20″ bike is normally the correct size for kids aged 5 to 8 with a height of around 3’11” to 4’3″. If your child is shorter than this range, they might do best on a 16″ bike that is typically recommended for kids aged 4 to 6 years old.

Can a 6 Year Old Ride a 12 Inch Bike?

A 6 year old is probably too big to ride a 12″ bike. These are some of the smallest bikes available for young learners and are rated to fit kids aged 2 to 4 years old or who measure between 2’8″ and 3’3″. 6 year old kids are taller and have a longer leg inseam so 16″ or 20″ are a better choice.

How Tall Should You Be to Ride a 20 Inch Bike?

The rough height estimation to ride a 20″ bike is between 3’11” and 4’3″ . But keep in mind that this is just a suggestion and that every child has a different body composition and level of biking ability. If you child is on the taller end of the range and has a solid skill level, they could be ready for a 24″ bike.

What Size Bike Frame for 6 Year Old?

Kids’ bicycle sizes are determined by the size of the wheels rather than the frame size.

Adult bicycles’ frames are measured differently than children’s bicycles.

A 20-inch bike, which is also the bike size advised for 7-year-olds, would be suitable for a 6-year-old.

20 inch here refers to the diameter of the wheels and not the size of the frame.

What Size Bike for a 6 Year Old in UK Or Australia?

Kids’ bikes are sized according to the diameter of the wheels, regardless of where you are from.

Therefore, the height of your child and matching that to the bike are the two best ways to size the bike for your child.

So a child who is six years old and between 43 and 55 inches tall in the UK or Australia will fit comfortably on a 20 inch bike.

How to Measure Your Child for a Bike?

Before making a purchase of a kids bike, it is crucial to measure the child’s height and leg inseam. The best way to measure your child’s height is to have them stand with their backs to the wall. Once that is done, ask them to hold a book between their legs. The inseam is the measurement between the surface of the ground and the point where the book’s spine meets their crotch.

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