Lightweight and streamlined
We tried a heavier bike before getting this one, and the lighter weight really makes a difference!
Age: 5-8 years
Height: 43-51 inches
Weight: 13.8 lbs (6.2 kg)
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Biky Air 20 is a lightweight 20-inch single-speed kids bike (13.8 lb without pedals, 14.2 lb with pedals) for children of 5 to 8 years; Two Wheeling Tots called the Biky Air 20 the lightest single-speed 20-inch bike in their test group (2026). Its role in the Biky line: the step up to the big bike without the fear of the big bike, and the bike to learn on late. The Biky Air 20 weighs what most 16-inch bikes weigh, so the child controls it from the first minute and lifts it alone around the corner where no parent is standing. For a child of 6 to 8 who has not learned to ride yet, often after a bad start on a heavy bike, the Biky Air 20 is the bike to learn on: at this weight, with two hand brakes and a low step-through, the child learns quickly even without balance bike experience. Parents on bikybikes.com describe a six year old who was scared of going fast on a heavier bike without hand brakes and found that confidence on the Biky Air 20, about 10 lb lighter. One gear and a chain covered end to end mean nothing to shift and nothing to maintain on the Biky Air 20.
The Biky Air 20 weighs 13.8 lb (6.2 kg) without pedals, 14.2 lb with pedals. Two Wheeling Tots called it the lightest single-speed 20-inch bike in their test group, and Bikerumor named it Editor's Choice Kid's Bike 2025. Single speed with a gain ratio tuned to the age, front and rear Tektro hand brakes with short-reach alloy levers, freewheel with no coaster brake. Aluminum frame with a low step-through, full-coverage chainguard, solid front chainring, internal cable routing. For riders aged 5 to 8, 43 to 51 inches tall, with a 19.5 to 23.5 inch inseam. 90-day returns and complimentary shipping in the US.
See the Biky guide for a 5 year old, a 6 or 7 year old or a 8, 9 or 10 year old, and the kids bike gift guide.
The Biky Air 20 weighs 13.8 lb (6.2 kg) without pedals and fits riders 43 to 51 inches tall, for 5, 6, 7 and 8 year olds (ages 5 to 8) with a 19.5 to 23.5 inch inseam. This is a 20 inch kids bike for riding around the neighborhood, with one gear and two hand brakes and nothing to shift. A bike for a 5 year old who has outgrown 16 inch wheels starts here.
Awards: Two Wheeling Tots Best Single Speed, 97.0 out of 100; Bikerumor Editor's Choice 2025, Kid's Bike; The Bike Dads neighborhood bikes guide.
Two Wheeling Tots, The Best 20 Inch Bikes for 6 and 7 Year Olds, updated October 12, 2026: Best Single Speed, 97.0 out of 100. twowheelingtots.com
Two Wheeling Tots, model review: "the lightest single-speed 20 inch bike in our entire test group". twowheelingtots.com
Bikerumor, Editor's Choice 2025, Kid's Bike. bikerumor.com
The Bike Dads: listed among neighborhood bikes in their 2026 guide. thebikedads.com
Why families trust Biky. Biky Inc., Southern California, founded in 2023; the first Biky Air bikes reached families in February 2024. More than 2,700 Biky Air bikes sold to about 2,300 families in all 50 states. Lifetime warranty on frame and fork, 90 days to return with return shipping on us. Real people answer texts and emails: within an hour on weekdays between 9 am and 5 pm Pacific time, within 24 hours evenings, weekends and holidays; closed on Thanksgiving Day and Christmas Day. About Biky. All customer reviews, word for word, including 4-star and 3-star ones: bikybikes.com/pages/reviews. Numbers as of November 1, 2026.
The Biky 20 is designed for older and more experienced children, providing a smooth transition to more challenging and longer adventures.
Yes: the Biky Air 20 fits 5, 6, 7 and 8 year olds who are 43 to 51 inches tall with a 19.5 to 23.5 inch inseam. The seat starts at 21.5 inches, so both feet reach the ground at a stop. A smaller 6 year old under 46 inches still fits the Biky Air 16, which fits from 40 inches. From 49 inches the Biky Air 24 S7 also fits and gives more room to grow. Measure the inseam first with the Biky Finder.
The Biky Air 20 has two Tektro hand brakes, front and rear, and the lever needs 1.1 kgf (10.8 N) to engage the pads and 1.2 kgf (11.8 N) at full squeeze. Biky measured that with a hanging scale at the lever tip, October 2026, one bike each. The levers are short-reach alloy, sized for small hands. Reviews that mention a single rear brake describe an earlier build. There is no coaster brake, so the wheel freewheels and the child stops with the hands.
The Biky Air 20 fits a 19.5 to 23.5 inch inseam, and the seat adjusts from 21.5 to 28 inches with a quick-release clamp, no tools. Measure the inseam: the child stands against a wall without shoes, you put a book between the legs, and you measure from the floor to the top of the book. Start with the seat low enough that both feet sit flat on the ground. If the child falls between two models, the smaller wheel is easier to handle and the larger one gives room to grow.
The Biky Air 20 arrives partly assembled, and an adult needs about 5 minutes: mount the handlebar (4 mm hex, 6 Nm), attach the front wheel, install the pedals and clip on the reflectors. The box holds the pedals marked R and L, a white front reflector, a red rear reflector and the 4, 5 and 6 mm hex keys you need. A kickstand is added on request, as a gift: write to info@bikybikes.com when you order or after delivery and we send one at no charge. Lights are not included, though the rims and the tire sidewalls are reflective. You pick the color at checkout: Candy Cane, Bubble Pink, Splash Blue, Sunbeam or the Limited Edition, five colors in all.
Orders for the Biky Air 20 ship the same or the next business day and usually arrive in 3 to 5 business days, with complimentary standard ground shipping to the 48 contiguous states. 2-Day and Overnight are available at checkout at the carrier's rate, and shipping to Alaska, Hawaii and Puerto Rico is $49 per order. You have 90 days from delivery to return the bike: email info@bikybikes.com first for the return address, and the refund goes back to the original payment method within 3 to 5 business days of the return arriving. Return shipping is on us: we email you a prepaid label.
The Biky Air 20 has one gear, weighs 13.8 lb (6.2 kg) without pedals and costs $499. The Biky Air 20 S7 has seven gears with a MicroShift grip shifter and a gear indicator, weighs 16.3 lb (7.3 kg) and costs $589. Both have 20 inch wheels and the same fit, 43 to 51 inches tall. Take the single speed for flat neighborhood riding, and the S7 for hills and longer rides.
Yes, the Biky Air 20 has a Hebie Chainglider: a closed cover around the whole chain, front and rear, so trouser legs, laces and fingers never touch the chain and the chain stays clean. A chainring guard on most kids bikes covers only the front sprocket; the Chainglider encloses the entire chain run. The front chainring is solid, with no cut-outs that could pinch a finger.
No. The Biky Air 20 ships with a freewheel and two Tektro hand brakes, front and rear, with short-reach alloy levers that need 1.1 kgf (10.8 N) to engage. The child brakes with the hands from the first ride and can pedal backward to reset the pedals, and there is nothing to remove or convert later.
We tried a heavier bike before getting this one, and the lighter weight really makes a difference!
I bought the super lightweight Biky Air 20 bike for my 7-year-old son, but it is so well-designed that even my 5-year-old is able to ride it with ease. As a parent, I am incredibly happy with this purchase. It strikes the perfect balance of being extremely safe and lightweight, while still being a fast and fun bike for the kids to ride. Highly recommended!
My son has so much fun riding this bike, and we absolutely love it! It’s very lightweight, and the shipping was excellent—the bike arrived carefully packaged. We’re really happy with it and would definitely recommend it to other families!
My daughter loves her new bike. Light, beautiful and takes her everywhere she wants to go!
Extremely light, pretty, and child loves riding it.
In spite of the long back order wait, my granddaughter loves the bike. The aluminum frame is light and well constructed. Workmanship is excellent.
Our 6 year old had hard time moving up from Woom 3 bike he outgrew, because all 20in bikes was significantly heavier. Until we found biky, and their 20 in bikes weighs exactly the same as his 16 in bike! He loves his big boy bike!
We bought it for my son's 7th birthday and he enjoys riding it every day!
It was very easy to assemble and he helped by adding the stickers that came in the box.
It does not come with a kickstand, but I was informed that they will have one available soon.
We cannot be happier with our purchase!
We have 4 kids and didn't find Biky until our youngest was 7 yrs old...so we've owned many different name-brand kids bikes: burley, woom, REI, Scott,...this one wins for ease of use out of the box, how incredibily light it is and on price point. Most bikes weigh twice as much as this one and the difference is noticeable, especially with kids. Will it hold up as well as the much more expensive woom bike? That remains to be seen. The woom feels more substantial, and holds up well to the beating our kids gave them for 6 plus years and multiple siblings. But it also comes at a price point that is arguably much, much higher. Of course, This review is for Biky. Great bike, great price. If others are out of your price range, this is the company to go with.
My daughter absolutely loves this bike… She was afraid of moving up in bikes and getting rid of her training, wheels, but this bike gave her so much confidence that she was off and loving it within five minutes of getting on it!
It is very light and there was a lot of thought gone into its design, and it is a high quality bike, buy with confidence!
I was looking for the perfect bike for my 7-year-old granddaughter. After doing a lot of research, I decided to go with the 20-inch Biky Bike. The bike is the lightest bike on the market, and the build quality is exceptional. Customer service and shipping were perfect. I highly recommend this company to all my friends and family.
My 6.5 y/o son loves his Biky Bike! He learned to ride on a heavy bike with coaster brakes about a week and a half before we got his Biky Air 20. He noticed the difference between the two bikes immediately and wants to ride his Biky Air multiple times a day. :) My husband had no trouble putting the bike together. The Biky Air 20 is so lightweight and clearly has high quality components. It is easy for him to handle, and the hand brakes were a very simple transition for him. I put a piece of blue tape on the rear wheel brake (right hand), and he caught on right away. I am so happy with this purchase! It gives me so much joy to see my son so happy and free.
We are very happy with our Biky bike! It’s truly incredibly lightweight, and the difference compared to other bikes is huge. It’s so much easier for a child to ride, and you notice it immediately. Super smooth and easy to control. Definitely worth the purchase!
One small suggestion: it would be great if you added a kickstand as an accessory so the bike could stand on its own.
We like our new big boy bike and so far, it's been easy to adjust to and fun to ride. Only wish it came with a stand, too! But otherwise, it's turning out to be a good purchase.
My child loves this bike and has much more confidence
I had a difficult time choosing a bike as I was buying a 16” and 20” at the same time for my kids. I had an older 16” that my dad had picked up for $10 or so, but it was so heavy and my daughter never got the hang of it without training wheels. I thought about Guardian bikes, but the deceptive pricing structure, mixed reviews on quality, and political leanings made me wary of them.
I ended up with a used Woom 3 for my son and a 20” Biky for my daughter. I would say they are similar in quality, very lightweight, and the proportions are just right for kids. My daughter actually started out learning to ride on the Woom (it came a couple days earlier) and then resisted moving up a size because she was nervous. Once we got her to try the Biky it was game over-she absolutely loves it. It is so easy for her to manage and within a few days of riding she is a pro, and I wouldn’t consider her especially coordinated. I love the cables that tuck into the frame (steering limiter is what they call it I believe) and the brakes are so easy to use (we put a sticker on the back brake so she knows which one to use first). Shipping was fast and it was easy to put together. I would consider it worth the cost-but we got the red on sale and it was the upper end of my budget for a kids bike. My only real complaint is that it does not have a kickstand. At this price point that would be a feature I would expect to see. We did end up adding an aftermarket one but even if Biky made one I would have liked to go that route.
All in all I am very happy with this bike and recommend it to people I know. I will definitely be purchasing again when we are ready for gears/a larger size.
My son fell in love with this bike! He’s been using it for over six months now—and he handles it with ease!
I recently purchased a 20-inch bike for my 7-year-old, and the bike itself is great. However, I quickly realized that it doesn’t come with a side stand.
Could someone please suggest which kickstand would be the best option for this bike?
My 6-year-old daughter's WOOM GO 3 is getting too small. We want to buy her a 20-inch bike. My wife asked me to pick the bike, because I am an engineer. I got furious when I found out that all the other good brands' bikes had shifters and even disc brakes. Seriously? If these designers think we want to spend money on features, they are wrong. We want quality, safety, and the right mindset from the bike designer who understands what a kid needs. Until I found BIKY. They get all the right components. A 6-year-old does not need a shifter, disc brake or suspension. Simple, light, and safe is the priority. I love the simple design and the high-quality components I saw when putting it together. And most of all, the bike chain. OMG. This is the right bike chain for a kid! I had my finger caught in the chain when I was a kid. When I saw the chain, I basically told my wife that no more discussion. So I put the bike together that night. This is my dream bike for my daughter!
Great bike for kids. Very light and easy to control. Brakes work great
Got this as a present from Santa for my 5 1/2 year-old. It’s a little tiny bit tall for him, but the previous size down was a little too short so we went for it. He’s already riding an assisted, and he loves his new bike. Only wish it came with a kickstand.
We gave biky a try and we are thoroughly impressed. My wife and I are amazed how light this bike is. My daughter loves it. We can’t recommend it enough.
I really didn’t want to spend this much on a bike, but after watching my kiddos cousin using a much cheaper bike and her struggles i decided to try it. I definitely think it’s going to be worth it! Sooo much lighter! It’s going to be a Christmas present but so far it’s perfect. Packaged extremely well and fast delivery.
This is my 6 year old daughter’s first 20” bike. Her previous bike dint have hand brakes so she was scared of going too fast. But this bike gave her the confidence she needed to go faster. Not to mention this bike is about 10 lbs lighter than the previous bike she had! Customer service has been great and has been very accommodating. Thank you all! Would definitely recommend this to any parent who wants their child to learn how to ride a bike quickly and safely.
My son LOVES this bike!
This is already our second bike — we learned to ride on the first one at age 5. Now our daughter asked for the Biky Air 20, and it arrived yesterday. She spent the whole day riding it with so much joy! Thank you for such a wonderful bike!
Biky is pure magic! So lightweight! My 5-year old loves it! Learned how to ride it within the first hour. Tried Woom before - it didn’t work and with Biky it just clicked!
This bike is incredibly lightweight, making it perfect for kids to ride and handle with ease. It’s well-balanced, easy to maneuver, and ideal for building confidence in young riders.
This is my son's second bike and he loves it. His previous bike was a Woom 2 (14" bike) and honestly he had outgrown it for over a year already. His inseam is 21.5" and height is 48". He's 6 years old and he's been riding bikes every since he was 2. He started with a balance bike for almost a year and then picked up the woom pedal bike immediately. I highly recommend this approach and plan to do the same with my other kids.
The Biky arrived within a few days after ordering. The packaging box was slightly damaged (probably UPS fault) but the bike itself was fine. The frame and wheels was well padded throughout. I have no experience with assembling bikes but I was able to easily follow the instructions to attach the wheels and handle bars.
We've had the bike for a month now and we're still satisfied with it. So far we've stuck to just riding around the neighborhood or at the park and it's been excellent. There was no kickstand so I bought a third party one along with a bell.
We're happy with our purchase and I have no doubt this quality bike will still be good for our next child once they're ready in a few years.
Daughter was off training wheels in minutes after upgrading to a 20 inch bike. Freehub and dual brakes are a plus.
The biky 20 inches bike is a great choice.
My daughter has been struggling with getting off the training wheels from her old bike that she was to big for. When we met biky at the otter classic my daughter was fearful to get on a bike without training wheels. However, I noticed the details that biky put into creating their bikes with children in mind. The bike is light, so it’s easy to balance. The bike also has chain that (protects) does not expose the gears. This is a very well thought out bike.
My son had a hard time making the jump from a woom 3 to a woom 4 with gears. He lives this bike since its a great step before getting gears on his next bike!
We got this bike for my daughter and very happy with our choice! It’s sooo light and well made. Don’t hesitate to buy one for your kids.
My 7 year old was one of those kids that just couldn’t get the hang of balancing and riding a bike. However, after two sessions with this bike, she rode a 1/4 mile all by herself!
We got this bike a few weeks ago, just before it got super cold out. My little one got on it and was able to get up every hill! Previously on another heavier bike he had to get off on the hills. He was so proud of himself! Great well made bike;)
The Biky air 20 is the perfect bike for our bike bus! Super lightweight which will allow the kids to ride further with ease! The quality and build is amazing! The perfect bike for neighborhood rides, and to get kids riding longer and further! Assembly took about 10 minutes. Very happy kids, and a happy bike bus!
We made the right choice for my 6 year old son. The quality is very good and it is also very light.
My daughter is in love with this bike. It's fairly light, very well built and looks very solid.
Finally I can free my hands! My son assembled it himself and carries it everywhere himself! So happy with this purchase!
As a bicycle education professional, I get to see a LOT of different bikes. Biky has quickly rolled to the top of the ones I will recommend for kids, especially those kids who are slight of build and nervous of stature. The upright positioning and lightweight materials promotes confidence and ease of use.
I found about this bike from a trip to Pretend City. I couldn't believe how lightweight it is and I was impressed with the build quality. I reached out to Biky and they were quick to answer my questions. I immediately purchased the Biky 14 for my 4 year old and waited for the Biky 20 to be stocked for my 6 year old. I received the Biky 20 assembled, but I know from the Biky 14, that it is easy to assemble. If your little one doesn't know how to bike yet, you can easily remove the pedals and use it as a balance bike. My kids both love biking more, especially with matching bikes. Biky's customer service is top notch and if you're local, they will make sure everything is perfect.
Reviews of the Biky Air 20 collected through Judge.me after purchase, shown word for word, including the 4-star and 3-star ones. Updated November 10, 2026. Reviews of every model: bikybikes.com/pages/reviews.
| Wheel size | 20 in |
|---|---|
| Rider age | 5, 6, 7 and 8 years (ages 5 to 8) |
| Rider height | 43-51 in |
| Rider inseam | 19.5-23.5 in |
| Seat height | 21.5-28 in |
| Weight without pedals | 13.8 lb (6.2 kg) |
| Weight with pedals | 14.2 lb (6.4 kg); the pedals weigh 0.4 lb |
| Frame | 6061-T6 aluminum, low step-through, internal cable routing |
| Brakes | front and rear Tektro C310 (110 mm) with Tektro JL352-RS short-reach alloy levers, freewheel, no coaster brake |
| Brake lever pull force | 1.1 kgf (10.8 N) to engage, 1.2 kgf (11.8 N) at full squeeze |
| Gears | 1 speed, 25T x 14T freewheel |
| Shifter | none |
| Chain | KMC Z6 |
| Chainguard | Hebie Chainglider, fully enclosed front and rear: the whole chain runs inside a closed cover, so clothes and fingers never touch the chain |
| Rims | FSB DA16 double-wall aluminum, reflective |
| Tires | CST C1959 20 x 1.5, 60 TPI, reflective sidewall |
| Tubes | CST, Schrader valve |
| Hubs | sealed bearings, 85 mm front and rear, 14T freewheel |
| Crankset | ProWheel 115 mm, 25T chainring |
| Handlebar width | 540 mm |
| Grips | 22 mm |
| Saddle | Velo V-1660 |
| Seatpost | 25.4 mm, quick-release clamp |
| Steering limiter | no |
| Quick-release front wheel | no |
| Maximum rider weight | 130 lb (59 kg) |
| Colors | Candy Cane, Bubble Pink, Splash Blue, Sunbeam, Limited Edition |
| In the box | bike partly assembled, pedals marked R and L with reflectors, white front reflector, red rear reflector, 4, 5 and 6 mm hex keys; a kickstand is added on request, as a gift |
| Assembly | about 5 minutes for an adult: mount the handlebar (4 mm hex, 6 Nm), attach the front wheel, install the pedals, clip on the reflectors |
| Price | $499; Limited Edition $599 |
| Returns | 90 days from delivery. Return shipping is on us: we email you a prepaid label. |
Brake lever pull force measured by Biky with a hanging scale at the lever tip, October 2026, one bike each. Weights measured by Biky on a hanging scale, tires inflated, no kickstand, September 30, 2026. The tire pressure range is printed on the tire sidewall.
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