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20 Inch Large Bike

363 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 363 Reviews
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CD
03/19/2021
Carlos d.
United States United States
Excellent customer service

My experience with Guardian was excellent. Bike is awesome and had a excellent experience with their customer service. During the assembly, I had to contact customer service to get some spare parts and their response was great.

04/14/2021
Guardian Bikes

Hi Carlos, I'm so glad we were able to help! Let us know if you need anything else. - Aly @ Guardian

PK
03/17/2021
Prashanth K.
United States United States
Best bike and best buying experience

We totally loved the bike. They are really well built, and their braking system is awesome! The customer service was awesome as well. These bikes are really do have kid geometry in mind. Our daughter is 48" tall, and we thought 24" bike would be big, but it turns out she is quite comfortable with it.

04/14/2021
Guardian Bikes

Hi Prashanth, We agree, the braking system is AWESOME! Thank you for taking the time to leave us a review :) -Aly @ Guardian

NA
03/16/2021
Natalie A.
United States United States
On Guardian Bike #2!

We received our 20 inch Guardian bike in time for Xmas, despite the shipping delay scare and also the inventory was low for bikes everywhere. We had already bought a 16 inch bike the year before for our 5 year old son, and he literally jumped on it without help and started riding Xmas day. He obviously outgrew the 16 inch bike pretty quickly so we knew we needed a larger size. We have had nothing but a positive experience with Guardian. They are priced fair compared to more expensive competitors but also engineer their products with growing children in mind. The bikes are easy to assemble and are great quality. Despite how great of a rider my son is, he has crashed into trash cans and all sorts of things and the bike has never broken. So quality is there no doubt! Trust me...we’ve tested it! If you’re looking for quality but don’t want to break the bank, go with Guardian, you won’t be disappointed and your kid will be happy.

03/17/2021
Guardian Bikes

Hi Natalie, Happy kiddos and satisfied parents is our goal! So happy we could make it happen for your family :) -Aly @Guardian

JS
03/16/2021
Jim S.
United States United States
This is the greatest company I have ever purchased from!

We ordered a 20 inch bike for our grandson to learn to ride with. He was right on the edge of needing a larger bike and once he got comfortable with the smaller bike, he was ready to move up in size. This was all within a month of receiving the bike. I called the company asking about how to raise the handle bars but instead of that they suggested that he really needed a larger size, and sent a new 24 inch replacement and asked us to give the smaller bike to someone who needed it. Who does that? These are great people with a humanitarian business model. I wish them great success. Please purchase your next bike from them.

03/17/2021
Guardian Bikes

Hi Jim, Thank you for the amazing feedback. We are thrilled to hear you consider us the greatest company you have ever purchased from. We really appreciate it. Please reach out if you need anything. We are here for you. Sam @ Guardian Bikes

AL
03/08/2021
Adam L.
United States United States
Quality Bike and Great Customer Service

I received my bike on a Sunday and discovered there was an issue with the brake. I called and wasn't connected but just assumed they were closed on Sunday for customer service. I was wrong! Sam called me backed shortly after my call and assisted me with troubleshooting the issue I was having and resolved the issue to my satisfaction. This was a great customer service experience. As for the bike, it seems like very high quality and my child loves it! It was very easy to assemble and their instructional videos make it easy for anyone to follow the steps and get the bike up and running quickly. Will be recommending these bikes to anyone that is looking.

03/08/2021
Guardian Bikes

Hi Adam, We are so happy that we were able to help you and most importantly, that your kiddo loves their bike :) -Aly @Guardian

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