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20 Inch Large Bike

399 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 399 Reviews
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Filter Reviews:
ES
07/23/2021
Edward S.
United States United States
Awesome

Quick delivery, easily assembled, and great quality. My daughter loves it and I think the value is great.

07/23/2021
Guardian Bikes

Hi Edward, We're so happy that your daughter loves her bike and that the assembly was easy! Reach out to us if you need anything else! Best, Aly

CZ
07/17/2021
Costantinos Z.
United States United States
Good quality bike

The bike arrived in a timely fashion and assembly was easy as promised. The only issue we encountered was that the part of the frame where the rear derailleur hangs was bent, presumably in the shipping process. It needed quite a bit of adjusting so that shifting worked properly. Other than that, everything was great, and the kiddo LOVED riding the new bike!

07/22/2021
Guardian Bikes

Hi, Adam here at Guardian Bikes. Glad to hear you got the bike working and sorry it took a hit in transit. If you run into issues please let us know and we are happy to help. Take care, Adam @ Guardian Bikes

KD
07/16/2021
Kevin D.
United States United States
Top notch service!

Called and spoke with guardian associate. All my questions were answered. They helped me choose to best bike for my 4.5 yr old. She loves her new velocipede. Thank you Guardian!

A Guardian Bikes Customer
JG
07/11/2021
Johnny G.
United States United States
Awesome Bike

My son was very comfortable riding this bike bike. It was the right height and size. He learned riding on his own.

JL
07/08/2021
Jason L.
United States United States
Another Quality Bike from Guardian

Upgrade my 6 going on 7 year old son from a 16" to a 20" (large) as he had outgrown the 16" (which is going to sister now!). Impressed with the quality, light weight, and technology with the sure stop breaking on the new bike. Only downside was the derailleur was misaligned upon delivery and only able to shift to three gears, requiring servicing. Otherwise ordering was a breeze and shipping was quick, even across the country from west to east coast.

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