base 20 | 20 inch bike
Age 5.5 - 8 years | Child Height 113 - 130cm
FREE KICKSTAND with this bike! Add both the bike and kickstand to your cart, then use discount code BFKS at checkout. Full details here.
With 7 gears and weighing only 8.3 kg, this ultralight, easy-to-ride 20 inch bike combines a low, stable geometry with top-notch components for long-lasting performance.
Sizing info
Typical age: 5.5–8 years
Approx. height: 113–130 cm
Inseam (the best guide): 50–61 cm*
*For brand-new or cautious riders, we recommend a minimum inseam of 53 cm for greater comfort and confidence.
Still unsure? Try our sizing guide to find the best bike for your child.
Shipping from $39
Bike shipping starts at $39 to most metro and selected regional areas. Accessories ship free when ordered with a bike.
In-stock orders are dispatched within 2 business days. Delivery after dispatch usually takes:
- SA: 2–5 business days
- VIC: 3–6 business days
- NSW & ACT: 4–7 business days
- QLD: 4–8 business days
- WA, TAS & NT: 5–10 business days
Regional and remote deliveries may cost more and take a little longer.
No-risk, free and easy 100-day returns
We're on a mission to create the best kids' bikes in Australia, and we think you’re going to love your new bike! But if you aren’t completely satisfied, you can return the base 20 within 100 days of purchase. We even refund your shipping cost and pay for return shipping.
You can see the full details of our return policy here.
Add accessories:
Seriously lightweight at only 8.3kg
Five year frame and fork warranty
7-speed Shimano gears
Easy 100-day returns
Why Kids (& Parents) Love it
Easy to Ride
A low centre of gravity, narrow q-factor (the distance between the pedals) and shorter cranks make it easier to start, stop and balance, while smooth 7-speed Shimano gears help them tackle hills and longer rides with ease.
Lightweight, only 8.3 kg
The base 20 is a trailblazer in lightweight design for kids, weighing only 8.3 kg. This builds confidence through improved manoeuvrability, easier handling, and reduced fatigue for young riders.
Geared up
Smooth shifting 7-speed Shimano gears help them conquer hills and longer rides with confidence.
Safe stopping
Powerful and safe stopping is ensured with high-quality front and rear Tektro V-brakes.
Grows with them
Designed with growing boys and girls in mind, the seat can be easily raised or lowered using the quick-release mechanism.
The handlebars can be rotated to optimise and adjust the reach and height as your child grows.
Long lasting and durable
Built to withstand the Australian outdoors with durable materials like stainless steel spokes with brass spoke-nipples, a fully sealed bottom bracket with steel cups and a semi-integrated threadless headset.
Combined with premium components like Shimano gears, Tektro brakes, Kenda tyres, ProWheel cranks, and a KMC chain, the base 20 is made to last—perfect for passing down to younger siblings or reselling later on
There’s more to a better kids bike.
“Base Bikes comes out swinging with all features: Light weight alloy frame, freewheel, low BB, short\small q-factor cranks, small diameter grips, threadless headset and easy pull Kids Tektro V brakes.
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More Information
Detailed Description
Frameset
Crafted from premium, ultra- lightweight Aluminium, our bike is designed with a low centre of gravity for enhanced balance and a long wheelbase to boost stability. This thoughtful design not only makes it easier for kids to handle but also provides ample room for growth.
The total bike weight, including the pedals, is 8.3 kg!
Wheels and Tyres
Super lightweight alloy rims with durable stainless steel spokes to prevent rust and Australian Standard compliant Cateye reflectors on each wheel.
Kenda Small Block 20*1.5 inch tyres with low rolling resistance and great for paved and light trail use.
7-speed rear cassette
Equipped with a Shimano 7-speed rear cassette for smooth transition between gears, making it easier for children to tackle various terrains and longer rides.
Shimano grip-shift 7-speed drivetrain with wide-span 12-32T gearing. We've equipped the bike with a grip shifter for gear changes, as its intuitive design makes it easier for kids who are just learning to navigate through gears.
Drivetrain
A sealed bottom bracket with steel cups for longevity, a Prowheel chainwheel with a double-sided chain guard to prevent little fingers from getting stuck in the chain. The narrow Q-factor (the horizontal distance between the pedals) is ergonomically adapted for children’s bodies, ensuring natural movement and optimal pedalling efficiency.
Saddle
Child-proportioned with a lightweight alloy stem. The saddle can be easily adjusted up and down using the quick release.
The seat post also has a clear, minimum insertion line, and a rear Cateye reflector, to keep safety a priority.
Handlebars
54 cm wide for stable riding, black anodised for maximum durability, lightweight and adjustable, with a thinner grip to suit little hands and the inclusion of a locking clamp to keep the grips safely in place.
A bell and front (and rear) Cateye reflectors are included and arrive already attached.
Headset and Stem
A NECO 28.6 mm threadless headset with sealed bearings for durability, designed to withstand the rugged Australian outdoors.
A lightweight stem with 40 mm extension and 3-degree rise, ensuring a secure connection between the handlebars and the headset with a sleek, rounded design.
Brakes
Tektro J310 V-brakes front and rear with child friendly Tektro micro-reach JL-350 brake levers for maximum quality and longevity.
Components / Specifications
Frame: Aluminium.
Fork: Aluminium with alloy steerer.
Brakes: Tektro J310 V-brakes front and rear with Tektro micro-reach JL-350 brake levers.
Freewheel / cassette: Shimano CSHG20072 12-32T, steel, free-wheel.
Chainwheel: Prowheel, 32T with 115 mm alloy cranks, narrow q-factor.
Bottom bracket: sealed bearings with steel cups and aluminium sheath.
Headset: NECO, sealed bearings, 28.6 mm diameter.
Rims: lightweight Aluminium
Tyres: Kenda K1047 Small Block Eight 20 x 1.5
Grips: 22.2 mm diameter with lock-on clamp.
Seat: lightweight kid sized saddle.
Handlebar: 540 mm wide with 40 mm rise.
Stem: 40 mm extension, 28.6 mm bar bore (for steerer).
Pedals: lightweight with Australian Standard reflectors.
Included accessories: front, rear and wheel Cateye reflectors. Child friendly bell.
Optional accessories: includes frame mount for a kick-stand (kick-stand not included). Check with accessory supplier to confirm compatibility.
Total weight: 8.3 kg (with pedals). Note bike weights are approximate and may vary slightly due to normal manufacturing tolerances and component variations.
Weight limit: 60 kg (bike, rider and cargo).
Note that some components may differ from those listed. Reach out if you would like to double check anything. Don't forget you're covered by our No Risk Easy 100 Day Returns.
Easy setup: 10 minutes from box to ride
The bike comes almost ready-to-roll. You will just need to attach the pedals and rotate and secure the handlebar.
We include the tools you will need and a bike manual describing these assembly instructions. You can also check out our assembly video guide.
Australian Owned and Operated
base bikes are Australian owned and operated. Your bike is dispatched from South Australia and supported by real people, locally based. Have a question? Pick up the phone — try us.
Common Questions
What age is a 20 inch bike suitable for?
The base 20 typically suits children aged 5.5–8 years, with an inseam of 50–61 cm. Age is only a guide—your child’s size and riding confidence matter more. For brand-new or cautious riders, we recommend a minimum inseam of 53 cm so they can reach the ground more comfortably while building their skills and confidence.
Importantly, not all 20 inch bikes fit the same! Frame geometry and design can vary between brands, so wheel size alone doesn't guarantee a good fit. If you're choosing between a 16 inch and 20 inch bike, our size guide will help you find the right fit without sizing up too soon.
Is the base 20 a good bike for learning to ride?
Yes—provided it’s the right size for your child! Weighing just 8.3 kg including pedals, the base 20 combines a lightweight, low and stable design with smaller grips and easy-to-reach brake levers.
These child-focused features help make starting, balancing and stopping easier.
Why choose a 20 inch bike with gears?
Gears make riding easier and more enjoyable as children gain confidence and start exploring further.
The lower gears make pedalling easier when climbing hills, while higher gears allow children to ride faster without having to spin their legs so quickly.
The base 20 has seven easy-to-use gears, helping young riders tackle hills, keep up on family rides and enjoy longer adventures with less effort.
We got this to help our 5 Y.O. transition from the cruzee to pedals. When we got it I left the pedals off for about a month so she could learn the brakes and balancing on the bigger bike. Once the pedals went on, it was about a month, and she was tearing around. Love the product and its so much lighter than any other kids bike on the market .
Our 7 year old absolutely loves this bike. It's super light weight and she's able to work the gears easily (she's new to gears!). The bike is great quality, and my 4 year old is desperate to have it when his sister gets too big in a few years time! Would recommend this bike whole-heartedly.
Awesome lightweight bike. Easy to put together
Thanks so much for the review! We put a lot of effort into making the bike as ready to ride as possible out of the box, so we're really chuffed its has really helped you out.
Thanks again!
Great bike. I previously mail forwarded a woom bike from the US but price was too much now. This bike is essentially the same spec but shipped locally. Would highly recommend.
Hi Alfred,
Thanks so much for this review. Its especially important regarding the comparison to Woom bikes. We take that as a great compliment!
Thanks again
Adam
This bike is excellent. I was looking at a Woom and found this online. This bike is comparable in every regard to the European version . A great range of colours, we love it.
Thanks so much, Anna! It means a lot to be compared so favourably with such a respected European brand. We put a huge amount of thought into making our bikes lightweight, easy to ride and available in colours kids genuinely love. We’re thrilled it’s been such a hit—happy riding!
Purchased a 20 inch bike for my six-year-old son. He loves it. Very high-quality. The price was slightly more than the local bike shop for same size, but the quality is great. It is a much lighter product which is good for young children. I would highly recommend.
The process to purchase was easy. It arrived to my front door in regional NSW in about a week.
Thanks so much for the review Peter! So glad your son loves the bike!
Our son absolutely loves his bike. It’s nice and light, great quality and design, user friendly. Adam provided exceptional service.
Thanks so much for the review Alex - we areally appreciate it!
I bought this bike for my grandson who is turning 5 soon. He has been zipping about on a WOOM 14 inch bike - it has been wonderful but he has already outgrown it and is ready for more adventure. The shipping cost of WOOM has become ridiculous so I looked for something similar. I chose Base because the bikes are lightweight (relatively speaking), are designed around kids including a low stand over height, components that are kid sized and have dual handbrakes. Being Australian and with a low delivery cost is a big bonus. The bike arrived quickly, well assembled and adjusted. I’m looking forward seeing my grandson take off on it!
Thanks so much for the review Andrew! We hope your grandson loves it!
I bought this for my daughter who is not 4 until another 4 months so I was skeptical it would be too big. I had to remove the rear seat reflector to allow the seat to go down a little further. She has previously used balance bikes and a tricycle however never tried without the training wheels, she got it within 5 minutes. She is now confident and off like she has been riding for months. Just needs to master the take off. Thank you for making an amazing light bike! She wanted the green which was out of stock so I rang all the stockists nearby and found plenty :)
We are very happy with the 20” Base Bike in matte blue. In terms of quality, it is very similar to our beloved Woom bike that we had in Europe, which was exactly what we were hoping for. The bike feels well made, lightweight and perfectly designed for a child.
Our son absolutely loves it and has so much joy riding it, which is the most important thing for us. I really like the overall design and especially how light the bike is, making it easy for him to handle.
The delivery and communication were excellent and completely hassle-free. You can really see that the company cares about the details and the quality of their products, which I truly appreciate. We definitely do not regret investing in this bike and would highly recommend it.
Thanks so much for the review Nikola, and what a lovely compliment to be considered similar quality to the legendary Woom!
Ordered 2x of the 20” bikes for the kids for Christmas and they’re just fantastic. The matte colours are stylish, the kids can hop on/off and manoeuvre the bikes themselves easily. We ordered the basket and kickstand for each as well. We love how easy it was to finish assembly and to take the pedals on & off. My 5yo has been on a toddler balance bike for a while now, so he picked up riding with the pedals within hours of getting his Base Bike! My 7yo is a nervous rider, but she has been loving getting on her Base Bike multiple times a day to get used to the balancing, she will be riding with pedals in no time! Highly recommend
Thanks so much Amanda! Its so great to hear about the easy assembly. And great to hear your kids are loving the bikes!
Recently bought a 20 inch bike for my 5 year old. The ordering process was very smooth, I was kept up to date with delivery and the bike arrived in perfect condition with only 2 very simple steps required for assembly. Couldn’t be happier with the bike itself- it is super lightweight, beautiful colour and well built with high quality components. My 5yo absolutely loves it and handles it easily. Would 100% recommend buying a base bike!
Thanks so much for the review and recommendation Anika! :)
We discovered Base bikes through a community bike riding session. My 5-year-old said he’d never ridden such an “amazing” bike. It was his first time using gears but they seemed really easy to change up and down. And my 3-year-old finally got the courage to try riding on two wheels, and is now confidently keeping up with his brother. Thanks Base bikes!
Thanks for the review Nicola! It was great to see your boys really enjoying riding, especially your younger one who made massive strides in his riding. Thanks again
We are all very impressed with our Base 20 bike - it is lightweight with a geometry that means it can be ridden confidently by kids at the lower end of the size guide safely. The gear shifter is unobtrusive, so children can set it and go, or change while riding.
Our child stepped up to the 20in bike from a 14in bike they had been riding for a year, aged 4.5. The transition was smooth and now we can’t keep up with them on foot anymore!
This bike has everything you would want in a bike for a child, and it is certainly a proper bike and not a toy bike!
It was so easy to set up out of the box and required no adjusting at all. I would recommend this bike to anyone who wants a high quality bike that will last a long time and help their child develop their cycling skills.
I’m so glad we found a bike as good as this to purchase. Thanks!
Thanks so much for the review Ayrton! So glad your child is enjoying the bike, and that you found it nice and easy to setup! Thanks again
We came across base bikes after a bike lesson with Lee-Anne at Ride-a-bike right. The bike was perfect for master 6, lightweight, stable and durable for a growing boy.
A few weeks in and now we can’t keep up with him! A real game changer for our family. Thank you base bikes for understanding what kids need!
Thanks so much for the review Vanessa!
My son (5 1/2 years old) received the bike for Christmas and instantly felt confident and comfortable riding it (this has not always been our experience with other bikes). Proper brakes and gears, lightweight and really looks great. He has the best bike in the family!!
Thanks so much for the review Anne! So glad it made a great Christmas present :)
We found it hard to find a bike that would suit our child. These base bikes seem to have a slightly lower centre of gravity which seems to help with balance for little ones. We have watched our little one ride each day and improve with confidence & ability since we got this a week ago! Very satisfied!!
Thanks so much for leaving a review, James! We're so glad to hear that the low centre of gravity is making a difference—there was a lot of design work put into the bike, and it's incredibly satisfying and motivating for us to know it's helping. Best of luck with her riding journey, and please don't hesitate to reach out if you have any questions. Cheers, Adam
My son loves the new lightweight base bike! Its so easy for him to ride and he is able to reach the brake handles with ease. He’s so confident now! Very happy🤩
Thanks so much for taking the time to provide a review Linda! Every review really helps and is super motivating for us!
My daughter loves this bike! It’s really light weight and the ergonomics have obviously been designed for kids, it makes it so easy for her to ride. She’s so fast on it! The quality is well worth the investment.
Note that some components may differ from those listed. Reach out if you would like to double check anything. Don't forget you're covered by our No Risk Easy 100 Day Returns.