Kids Bike Size Guide (And Sizing Chart) – Bike Club

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First things first, the thrill of getting your first bike is a special childhood memory, right? 💭 💯

Our aim is to ensure that Bike Club members are delighted when it comes to choosing a bike for their child, from the colour they prefer to a lighter frame.

Most importantly, they get to choose the perfect size for them, which is why we have come up with this handy bike size guide including a sizing chart.

The selection of the right size bike for kids of varying ages is important and this blog will cover the range of bike choices for these youngsters.

Why Choosing the Right Size Bike is Important

Choosing the correct-sized bike for your child is crucial and should not be underestimated, as it affects their cycling experience, sense of confidence, and safety.

A lot of parents tend to buy a bike slightly too big for their child to ‘grow into’. While we understand the financial reasoning behind this decision, as children grow in a flash, it often has many negative consequences.

This is where Bike Club comes in! Our Exchange service provides a cost-effective solution to this problem.

Your little one will find it impossible to balance on a bike that’s too big for them. Not only will they struggle to touch the ground, but their arms will be stretched out when reaching for the handlebars.

This may make your child feel nervous when starting to learn to ride a bike and make it challenging for them to control and uncomfortable to pedal.

Worse still, a bad initial experience can put them off cycling completely and that’s something that we absolutely don’t want (and neither do you!).

The same applies if the bike is too small for your child. It will be uncomfortable and discourage your little one to take up what should be a super fun life skill.

Cycling is a brilliant way to have fun, stay healthy and create happy family memories – but this is only possible through having the right-sized bike!

Kids Bike Size Chart

Struggling to work out what exactly is the ‘correct-sized’ bike for your child? Here is a bike size chart for you:

(For the most accurate results, we recommend using the Inside Leg measurement. You can also read our blog about age vs inside leg measurement).

As the bike size chart above suggests, there are different wheel sizes for different ages, as well as different inside legs and heights.

Something that also needs to be a consideration here is the minimum seatpost height. For example, with a balance bike, ensure that it’s not higher than your child’s inseam length. This will allow your child to put their feet firmly on the ground while ensuring they can learn to scoot and balance at the same time.

How to Measure The Right Bike Size For a Kid?

Kid’s bikes are measured by wheel diameter (in inches), and range from balance bikes that are approximately 10″ to 26″. This part is an incredibly important step in the entire process of determining the right bike size for your child.

Measure your child by using the following method:

Types of Kid’s Bikes

Balance Bikes

Balance bikes are perfect for toddlers and young children as they begin their cycling journey. Instead of using stabilisers, these are a much better choice for teaching kids the basics of balance and coordination, both of which are key for a smooth transition to pedals.

We recommend the Strider 12 Sport. It is one of the best-selling balance bikes globally, due to its lightweight and easily adjustable features. We recommend this bike for children aged 1 – 5 years old.

The Strider Rocking Base can be attached to the existing Strider Balance Bike, enabling younger children (under 12 months old) to strengthen their core muscles and increase their sense of spatial awareness.

First Pedal

First pedal bikes are usually 14″ and 16″ inch bike wheel sizes. These are great for 3 – 5-year-olds looking to get their first taste of two-wheeled adventures.

Our recommendation would be any bike from the Forme Cubley range, as they are incredibly lightweight and designed specifically with children in mind.

Off-Road / Hybrid

Once your child has progressed beyond the standard bike sizes for younger children, the next step usually involves upgrading to something a little more rugged such as a hybrid or off-road bike.

These start from 20″ wheels and are usually your child’s first introduction to gears.

For these bikes, we recommend the Forme Kinder range. They have all the benefits packed into the Cubleys, but for slightly bigger children.

What To Do If Your Child Is In Between Bike Sizes?

It’s fair to say that it’s pretty easy to choose a bike for your child when they are at the bottom end of the recommended height/inseam for a bike. However, what about when they are at the upper end? What should you do?

Don’t worry! As kid bike experts, we have seen it all so we think we’re well placed to help solve this problem for you. If your child is pretty close to the next size bike, then it’s time to move up to the next one.

And that is exactly why Bike Club exists – so you can exchange your child’s bike as they grow and you never have to buy one ever again.

Other things to consider are whether they are capable of handling a bigger, heavier bike yet? Are they going to be confident enough standing on their toes or will they be a little scared (which makes complete sense!).

If your child has physically outgrown their existing bike, then it’s definitely time to upgrade for something that suits their needs as they develop. But always keep in mind their level of ability and confidence before you make that decision.

Why Size Shouldn’t Be Your Only Consideration

The size of the bike for your child is the basis for this guide. However, it shouldn’t be your only consideration when choosing a kids bike.

Once you have determine what size your child needs, we’d recommend thinking about other aspects of the bike such as weight, brakes, tyres, whether or not you’re going to need stabilisers, handlebars and much.

This will then ensure that you are picking the most complete bike for your child and they are getting something that suits them in every way for their bike adventures.

Need More Help Choosing the Right Size?

We hope our bike size guide has been useful. For more information, our helpful Member Support Team are always on hand – ask away on Live Chat (hit the pink chat icon in the bottom right of your screen), or email

For more details on the types of bikes we have, you can find out more about them through this blog.