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20 Inch Large Bike

661 reviews
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Guardian 20 Inch Large Bike

Age: 6 - 9 years   Height: 45 - 53 inches



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Why Kids LOVE Guardian Bikes

Feature icon, Green Checkmark Lightweight Design Created with Lunacy Created with Lunacy

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.

Feature icon, Green Checkmark SureStop, Easy Reach Brakes Created with Lunacy Created with Lunacy

Feature icon, Green Checkmark Kid Friendly Gear Shifter Created with Lunacy Created with Lunacy

Feature icon, Green Checkmark Kid-specific Geometry Created with Lunacy Created with Lunacy

Feature icon, Green Checkmark Low Step-over Height Created with Lunacy Created with Lunacy

Feature icon, Green Checkmark Adjustable Seat Created with Lunacy Created with Lunacy

Feature icon, Green Checkmark Eye Candy Decals Created with Lunacy Created with Lunacy

Feature icon, Green Checkmark Double-walled Rims Created with Lunacy Created with Lunacy

We Make It Easy on the Parents Too

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Flat Rate Shipping

Shipping is $29 flat, and in-stock orders leave our warehouse within 3-4 business days.

100 Day Test Ride Icon

365 Smooth Ride Guarantee

We want to make sure the bike is perfect for your family, so we give you a FULL YEAR to test it out.

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Quick and Easy Setup

Get the bike from box to pavement in 5 minutes. So easy a busy parent can do it with ease.

Customer Reviews
4.9 Based on 661 Reviews
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Filter Reviews:
Leslyn R.
United States United States

Don’t know yet if it will work

The bike sizing was off. It’s a bit too big for my son to try the gliding trick. He is barely on tippy toes. I waited over 2 months to see if he would grow into and yet has.


Guardian Bikes

Hi Leslyn, Thank you for the review. I would recommend removing the seat reflector. This will help get the seat a little lower. We can also double-check the sizing. Please send us an email at [email protected]

A Guardian Bikes Customer
Saverio S.
United States United States

Package was in poor shape

The bike came a week later than expected and in a box which had clearly seen a pretty rough journey. Bike seems ok? But there is chain rubbing / clicking when in 6th gear, and I'm not sure if it's normal or not because of the shipping issue.


Guardian Bikes

Hi Saverio, Adam here at Guardian Bikes. Sorry to hear the bike had a rough journey! We can help you fix/adjust and gearing issues though. Please shoot us an email ([email protected]) and we can see why its clicking and get you a fix. Thanks, Adam @ Guardian Bikes

Robert H.
United States United States

First impressions good bike with setup issues

The assembly part (adding handle bars and pedals) was extremely easy however the brake pads were touching the rear rim tightly on both sides. Took me a little viewing of the online videos to determine I needed to let more cable out. My daughter just had her first ride on it and the bike would not change into 1st or 2nd gear and then the shifter lever turned 90 degree and I could not move it back on our ride. These are all issues I expect should have been found before it was shipped to us. That said my daughter seemed to adjust well to riding the bike and although the first time using a brake lever (rather than pedal brakes) seemed to adjust quite well. The bike seemed to fit her well and be natural to ride. These are first impressions and hoping once we get past some of the teething issues it will be a good bike.

Ryan H.
United States United States

Would be great except for shifting

The shifter is incredibly difficult to operate, especially so for a 7 year old. It’s disappointing being such a big component of the bike. Otherwise, a nice bike.


Guardian Bikes

Hi Ryan, Adam here at Guardian Bikes. I would like to help you with the shifter, it should be pretty low pressure to twist. Could you send me your order number and a few pictures of the bike and shifter? Thanks, Adam

Arthur L.
United States United States

Good value but could improve

Shipping came later than expected(guardian only counts when it ships while most people think when it arrives at your door). Shifter is too hard for my 7 year old to use. She just stays at 6 because she cant downshift. Whats the point of having gears then? Better gearing for more top end speed


Guardian Bikes

Hi Arthur, Please contact us at [email protected] and we can help you with the shifter. We are working on improving our shipping times and will strive to communicate more clearly. Thank you Adam @ Guardian Bikes

With Free shipping

365-Day Returns

Put our bikes to the test for a FULL YEAR

Return your bike at any time within the first year for any reason, we even cover shipping.

We Cover:

  • Free Returns & Exchanges

  • Local Mechanic Repairs

  • Spare Part Replacement

Training Wheels Compatible

We recommend using the balance bike method when teaching your child to ride a bike, but understand all children learn differently.

Compatible training wheels can be purchased here for our 14", 16", and 20" Bikes.

🎁 Important! Guaranteed Holiday Delivery Available!

Limited inventory! To ensure your gifts arrive by Christmas look for our distinctive Guaranteed Holiday Delivery Sticker.

To confirm, check the estimated ship times below the Add to Cart button on each product page. Bikes ordered before December 18th AND have our Guarantee Holiday Delivery Sticker WILL arrive before Christmas.

Questions or need help? Our Customer Experience (CX) team is ready to assist you via chat or email.

Happy Holidays

Bike being assembled

Assembly Steps

Step 1: Attach Handlebars

Step 2: Attach Pedals

Patented SureStop® Brake System

  • Easier to use – single lever braking

  • Safer to stop – prevents head over handlebar accidents

  • More control – stops faster by balancing front/rear braking automatically

Kid Friendly Gear Shifter

  • 6-speed twist shifter

  • Red visualizer to help with gear selection

  • Fun and easy way to learn