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How to choose a child's bike size? A superhero guide

6. 05. 2025 Články

This top-secret hero training will teach you who you'll get along best with around FÍHA, whether you're out exploring the area regularly or on your first big mission.

How to choose a child's bike size? A superhero guide

YAHOOO! Hello hero! And hello to the commander…er…parents!

Are you getting ready for your first big mission and need the best equipment? WOW – you've come to the right place! You'll find the The best kids' bikes for little superheroes! But what size bike should you choose?

SNAP! It's here! We've got a secret superhero training session for you that will help you choose a totally tight-fitting two-wheeled partner right before you say SNAP. So let's get down to it, heroically!

The Three Vs Rule

It's easy to tell the right wheel size - you'll just fly on a machine like this! WEEEOOO! If you want to go rocket-powered, your wheel can't be too big or too small. So, how do we do that?

Before we get into the action, let's clarify a few tried and tested rules for choosing a children's bike. SSHHH! Sit back and listen quietly so you don't miss anything:

  • Inside leg length: This is an absolute must! Stand up straight like you're about to save the world and get your heel to crotch measured. Your inside leg length will help you determine if you'll have a safe start on your bike.

  • Height: Every superhero is unique. Some have super long legs and some have super long torsos. So don't rely on the recommended height completely. The important thing is that you feel comfortable and confident on the bike - just like a superhero!

  • Age: Don't worry, you don't have to wait until you grow up to become a real superhero! Everyone grows at a different rate - so don't take this information too seriously either.

Which two-wheeled partner fits you perfectly? Our smart The table will help you choose FÍHA children's bike.  

FÍHA children's bike size chart

inner leg length (min.) height age
FIVE 16 45cm 100–115cm 3–6 years
FIVE 20 54 cm 110–125cm 4–7 years
FÍHA 24 65cm 120–140cm 6–10 years

Super parent tip: Take your hero to our secret base to test out his future machine ! Our development team will advise you on the right size bike for your child and help you choose the perfect superhero gear. You can find the coordinates of our secret bases on the page Where to buy !

From beginner to pro

Superhero in Training (3-6 years)

PHEEOOO! A balance bike is no longer enough for you and you want to really get into it? Sure thing – just make sure that you can at least reach the ground with your toes while sitting. And how do you do that? It's easy. Choose your first pedal machine according to the length of your inner leg.

Even cool superheroes like Rockeeon, Coral Bubble, and Aura Blazer started out cautiously: they started sitting down, learned to balance, and pedaled harder and harder before flying and cool T-shirts came along. You have to get really comfortable with the bike first —and since you'll be balancing on a tightrope, you need to be able to reach the ground with your feet.

TA DAAA! For beginner heroes, we have a great pedal bike FÍHA 16. The ideal partner for your first mission, which will welcome you into the fun world of our super bikes. All components are tailored to the smallest heroes, so you can safely reach the handlebars, pedals and brakes.

WHEW! The FÍHA 16" children's bike is so light that you can easily lift it over your head ! Add to that super-fast tires, easy handling and totally brutal design – and ride like a superhero! YIPEEE!

Advanced Superhero (4-7 years)

SSSWISHHH! We're adding speed! On the 20" FÍHA 20 children's bike, you'll find an 8-speed derailleur, with which you can easily handle even more advanced missions. But be careful - mastering the derailleur requires time, patience and supervision from more experienced heroes or parents. Make sure that your feet reach the ground. OUCH! This will avoid unnecessary collisions and ensure the safe completion of each mission. Therefore, when choosing a bike, pay attention to the length of the inner leg.

And don't worry - the FÍHA 20 children's bike remains super light, super easy to handle and perfectly tailored to advanced heroes! YEEE-OW!

Tip from Rockeeon: Want to master the derailleur like a master? Click HERE for my super secret guide!

Seasoned Superhero (6-10 years old)

KA-POW! So here we have the pros! The FÍHA 24 children's 24" bike is a top-notch machine for seasoned heroes who perfectly control their super bike, have mastered the gearshift and are not afraid to go out into any terrain: streets, cycle paths, but also fields or forest trails are their natural area. Of course, there is an 8-speed derailleur, with which you can start every adventure to the fullest. WHISHHH!

And BEWARE! If you can already start and stop standing, you can start flying! Real superheroes only need to touch the ground with the tip of one foot. By moving the saddle higher, you can really stretch your legs and reach the full “heroic range”, so you can literally fly. WHOOOSH! But be careful: don’t go full speed until you have the brakes fully under control ! Remember that everything takes time: every superhero has undergone rigorous training first.

If you ride with the saddle extended, the recommended inseam length is not too important. It corresponds to the distance between the saddle and the pedal at its lowest point. In this case, it is better to choose the size of the children's bike according to your height.

Let's face it: even parents make mistakes sometimes.

BA DUMM-TSSS! Unfortunately, even commanders make mistakes sometimes. Size A child's bike can be confusing for parents, so the mission often fails right from the start. For two main reasons.

"You'll be able to ride that bike in no time!"

EE! Not at all. Your parents hope that a bigger bike will last longer and save you money on other missions. But in the end, you'll end up feeling like an ant on a candy bar on a giant bike. Not only will it be uncomfortable to ride: it's also pretty dangerous. OWW! Every pedal stroke will be a lot of work and you'll quickly lose interest, so your superhero cape will fly off into the corner and there will be one less hero in the world who could save the world - and we can't let that happen!

"You should have a bigger bike by now, but we'll wait another year!"

UGH! Riding a bike that's too small is also a real bummer. As soon as you get on it, you're balancing like a tightrope walker, like your dad's back getting caught moving a closet. Plus, a small bike is slow, so you won't be able to keep up with your friends who have long since mastered supersonic speed, and every mission will be doomed. OOOPS! This is not how any superhero would want to end up!

Choose your favorite bike color and your superhero!

YAY! You've completed our secret superhero training, so you're officially ready to choose a partner! Each FÍHA kids bike has its own hero, so you'll never ride alone! They'll accompany you A seasoned superhero sidekick who will help you complete every mission. KABAM!

Which one will be yours? Street hero Aura Blazer, weather buddy Coral Bubble or trail king Rockeeon ?

It's going to be a blast with your new partner! So get started! Put on your helmet , spin the pedals and show what you've got! YEE-HAW!

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Rating

Our Customers' Opinions

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Completely satisfied. Everything came to me in order and quickly. The bike is high quality and light. My son really likes it.

David 17.06.2025

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Great bike. Playful design and fun story.

Petra 17.06.2025