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20 Inch Large Bike

389 reviews
With Free shipping

So much to love in one bike

SureStop, Easy Reach Brakes

With SureStop, there’s only one brake lever, so your kid can’t get confused when things happen fast. Our patented brakes won’t ever flip the bike, and the lever is in just the right place for kid-size hands.

Ultra-Lightweight Design

The Guardian AIROS is made of ultra-lightweight, aircraft-grade aluminum. It’s exceptionally durable and extremely easy to control, making it both super safe and fun to ride.

Eye Candy Decals

Our bike colors and designs were developed by kids, for kids, to make our bikes the coolest bikes on the block. Our Guardian ETHOS line uses water-transfer decals with a clear coat finish, giving the whole bike a polished shine.

Ultra-rigid Construction

Our Guardian AIROS are built with a threadless headset for a much more secure assembly, especially over the long term. The bottom line? That headset—and the handlebars attached to it—won’t ever start to wiggle on your kid.

Kid-specific Geometry

Kids don’t just need smaller bikes. They need different bikes. With all the right proportions. They need smaller grips. They need less distance between the pedals. They need shorter crank arms and a low center of gravity. All Guardian bikes are designed for kids, from the ground up.

Low Step-over Height

The low cross bar makes our bikes easy to get on, and a lot safer if your kid comes off their seat in a hurry.

Premium Shifting

Our easy twist shifters are simple and intuitive. Shift one way for higher gears, and the other way for lower. Easy, with plenty of range for even the toughest hills.

Double-walled Rims

Our double-walled rims can stand up to the extreme beating of a kids’ bike without bends, dents, or buckles. Even under the weight of a grown man. We tested it. A bunch of times.

Adjustable Seat

Every Guardian bike seat is both easily adjustable and easy to lock down. You can adjust the height to fit your kid as they grow up with the bike.

Smooth Welding

Toughness is built into every Guardian AIROS, but we smooth the roughness out—of the seams, that is. Our AIROS frame welds are reinforced for extra strength, then polished to perfection, without a single abrasive edge to mar that stunning paint job.

So much to love in one bike

SureStop, Easy Reach Brakes

With SureStop, there’s only one brake lever, so your kid can’t get confused when things happen fast. Our patented brakes won’t ever flip the bike, and the lever is in just the right place for kid-size hands.

Lightweight Design

The Guardian Ethos has a lightweight steel frame, making it easy to control while still durable enough to outlast your kid. Like every Guardian bike, it’s kid-tested to be safe and fun to ride.

Eye Candy Decals

Our bike colors and designs were developed by kids, for kids, to make our bikes the coolest bikes on the block. Our Guardian ETHOS line uses water-transfer decals with a clear coat finish, giving the whole bike a polished shine.

Kid-specific Geometry

Kids don’t just need smaller bikes. They need different bikes. With all the right proportions. They need smaller grips. They need less distance between the pedals. They need shorter crank arms and a low center of gravity. All Guardian bikes are designed for kids, from the ground up.

Low Step-over Height

The low cross bar makes our bikes easy to get on, and a lot safer if your kid comes off their seat in a hurry.

Standard Shifting

Our grip-shift components are simple and intuitive. Shift one way for higher gears, and the other way for lower. Easy, with plenty of range for even the toughest hills.

Double-walled Rims

Our double-walled rims can stand up to the extreme beating of a kids’ bike without bends, dents, or buckles. Even under the weight of a grown man. We tested it. A bunch of times.

Adjustable Seat

Every Guardian bike seat is both easily adjustable and easy to lock down. You can adjust the height to fit your kid as they grow up with the bike.

So much to love in one bike

SureStop, Easy Reach Brakes

With SureStop, there’s only one brake lever, so your kid can’t get confused when things happen fast. Our patented brakes won’t ever flip the bike, and the lever is in just the right place for kid-size hands.

Ultra-Lightweight Design

The Guardian AIROS is made of ultra-lightweight, aircraft-grade aluminum. It’s exceptionally durable and extremely easy to control, making it both super safe and fun to ride.

Eye Candy Decals

Our bike colors and designs were developed by kids, for kids, to make our bikes the coolest bikes on the block. Our Guardian AIROS line uses water-transfer decals with a clear coat finish, giving the whole bike a polished shine.

Ultra-rigid Construction

Our Guardian AIROS are built with a threadless headset for a much more secure assembly, especially over the long term. The bottom line? That headset—and the handlebars attached to it—won’t ever start to wiggle on your kid.

Kid-specific Geometry

Kids don’t just need smaller bikes. They need different bikes. With all the right proportions. They need smaller grips. They need less distance between the pedals. They need shorter crank arms and a low center of gravity. All Guardian bikes are designed for kids, from the ground up.

Low Step-over Height

The low cross bar makes our bikes easy to get on, and a lot safer if your kid comes off their seat in a hurry.

Premium Shifting

Our easy twist shifters are simple and intuitive. Shift one way for higher gears, and the other way for lower. Easy, with plenty of range for even the toughest hills.

Double-walled Rims

Our double-walled rims can stand up to the extreme beating of a kids’ bike without bends, dents, or buckles. Even under the weight of a grown man. We tested it. A bunch of times.

Adjustable Seat

Every Guardian bike seat is both easily adjustable and easy to lock down. You can adjust the height to fit your kid as they grow up with the bike.

Smooth Welding

Toughness is built into every Guardian AIROS, but we smooth the roughness out—of the seams, that is. Our AIROS frame welds are reinforced for extra strength, then polished to perfection, without a single abrasive edge to mar that stunning paint job.

So much to love in one bike

SureStop, Easy Reach Brakes

With SureStop, there’s only one brake lever, so your kid can’t get confused when things happen fast. Our patented brakes won’t ever flip the bike, and the lever is in just the right place for kid-size hands.

Lightweight Design

The Guardian Ethos has a lightweight steel frame, making it easy to control while still durable enough to outlast your kid. Like every Guardian bike, it’s kid-tested to be safe and fun to ride.

Eye Candy Decals

Our bike colors and designs were developed by kids, for kids, to make our bikes the coolest bikes on the block. Our Guardian ETHOS line uses water-transfer decals with a clear coat finish, giving the whole bike a polished shine.

Kid-specific Geometry

Kids don’t just need smaller bikes. They need different bikes. With all the right proportions. They need smaller grips. They need less distance between the pedals. They need shorter crank arms and a low center of gravity. All Guardian bikes are designed for kids, from the ground up.

Low Step-over Height

The low cross bar makes our bikes easy to get on, and a lot safer if your kid comes off their seat in a hurry.

Standard Shifting

Our grip-shift components are simple and intuitive. Shift one way for higher gears, and the other way for lower. Easy, with plenty of range for even the toughest hills.

Double-walled Rims

Our double-walled rims can stand up to the extreme beating of a kids’ bike without bends, dents, or buckles. Even under the weight of a grown man. We tested it. A bunch of times.

Adjustable Seat

Every Guardian bike seat is both easily adjustable and easy to lock down. You can adjust the height to fit your kid as they grow up with the bike.

Fully Tuned Delivery

At Guardian Bikes, we assemble most of your bike before we ship it, putting it through a rigorous 34-point safety check before it goes out the door. The only things left to add take about 10 minutes, and we’ll send the only tools you need right in the box.

Watch Assembly Preview

Fully Tuned Delivery

At Guardian Bikes, we assemble most of your bike before we ship it, putting it through a rigorous 34-point safety check before it goes out the door. The only things left to add take about 10 minutes, and we’ll send the only tools you need right in the box.

Watch Assembly Preview
Customer Reviews
4.9 Based on 389 Reviews
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Filter Reviews:
KK
06/21/2021
Katherine K.
United States United States
Great purchase!

This was easy to assemble & made of quality materials. My 8 year old loved his so much, that we got another for my 6 year old. Thoroughly impressed by the bikes & company!

LH
06/14/2021
Lauren H.
United States United States
Best fit for kids especially!

We are so pleased, as is our six-year-old! We'll be back to buy another next year for our younger child!

AD
06/13/2021
Andrea D.
United States United States
Worth the investment

This bike it awesome! With so many people having trouble finding bikes locally we decided to upgrade our daughter to the guardian as her first “gear bike.” It’s lightweight, functional, easy to assemble, and cute! It arrived quickly and we couldn’t be happier! It’s the 4th guardian in the cul-de-sac and now i know what the hype is all about! Can’t wait to get one for our other daughter soon!

AP
06/13/2021
Andrea P.
United States United States
Great bike!

Needed to upgrade from my 6.5 year old’s 14 inch Royal Baby bike. I was worried about the 20 inch size, but he is a confident rider and this bike will give him years of use. He loves the hand-brakes, easy-shifting gears, and ability to back pedal (previously he had coaster-brakes). Great bike!

A
05/25/2021
andy
United States United States
Own 20/24 inch Ethos and these bikes are not durable.

These bike are just ok. We've had quite a few problems with chains falling off and gears not switching smoothly. The gear shifter is bent so easily and just can't withstand the life of a kid. I've already had to get 2 full tune-ups ($180 total) for my older sons 24 inch ethos that we got from Amazon in the spring of 2020. The left pedal on my younger sons bike (the 20inch) keeps falling off. This makes sense to me because these bikes just have a bolt on the pedal that is ******* in with no nut keeping it in place. If I remember correctly you have to turn the way to tighten it the way that you would pedal so the engineers probably thought it would never be a problem. If a kid is coasting and backpedals though which I used to do as a kid it will become unscrewed and fall off. I haven't seen my 6 year old do this but it's just my theory. I like the braking system but bottom line is I'd tell people to try another brand but maybe all kids bikes are this sensitive.

05/25/2021
Guardian Bikes

Hi there! Kaitlin here with Guardian. Thank you so much for taking the time to share your review. We're so sorry to hear that you are unhappy with your bikes! We'd love to help. First, we sincerely appreciate the feedback on the derailleur's durability. I'll be passing your thoughts along to our product team. Kids can be rough on bikes, but we built ours to last! We have some instructional videos available in our help center for realignment issues that can help you get back on track. Or always feel free to reach out to our team & we can help out! As for the pedal, it sounds like the pedal may have been installed clockwise. The left pedal needs to be installed counterclockwise in order to stay installed while the rider is pedaling. I sent you an email asking for some photos so we can take a look. We definitely want to get this resolved for you! Thank you again for the feedback. We look forward to hearing from you and getting this all resolved! Best, Kaitlin @ Guardian Bikes

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