Size Guide
111 reviews
Speed Silver
Power Purple
Braap Blue

Wheel Size
20 inches
Approx. Age Range
5 to 9 years

Low Geo
Stable, agile, and easy to ride

$39 Shipping
in the Continental USA
Checked and Tuned
Each bike is checked & tuned prior to shipment.
Easy Assembly
Includes all the tools you need & easy instructions.
Kid Tough
Built tough, just like kids.
The 20" Alpha Three is our smallest geared bike. The NEW 9-speed Microshift drive train and 11-36T wide range gearing is the real deal and gives growing riders truly usable gear range. It features:
  1. Prevelo confidence inspiring low and narrow geometry. Prevelo geometry keeps the rider low, balanced and in control.
  2. Lightweight 6061 aluminum frame with custom formed tubing.
  3. Lightweight aluminum alloy fork with chromoly steerer.
  4. Front and rear v-brakes.
  5. Lightweight Allen head front and rear wheel skewers for secure wheel installation.
  6. Three piece crank with squared taper cartridge bearing bottom bracket and ultra narrow Q factor.
  7. Custom made cranks. All Prevelo cranks are sized specifically for each model bike, down to the millimeter.
  8. NEW Microshift 9-speed drivetrain. Uses a shorter pulley cage without comprising gear ratio width. Because kids’ bikes have small wheel diameters, rear derailleurs on kids bikes hang low and close to the ground. The Prevelo Alpha bikes use smaller cage derailleurs to keep things high and away from the ground.
  9. Microshift Trigger Shifters. Small hands have a hard time using twist shifters. We use reliable silky smooth thumb shifters. They are easy for small hands to operate, and operate just like shifters on high performance bikes.
  10. 95% assembled. Just install the handlebar, seatpost, front wheel and pedals.


Kid Centric Features

kids sized crank

Kid Engineered Crank

alpha three gears

9 Speed Microshift Drivetrain with Wide Span Gearing

internally routed cables

Internally Routed Cables

prevelo kid size brake and shift levers

Kid Size Hand Brakes and Easy to Use Microshift Thumb Shifters




Sealed Bearings

quick adjust seat height

Quick Adjust Seat Height

built kid tough

Built Kid Tough

girl riding bike

Confidence Inspiring Geometry


boy on bicycle



Customer Reviews
4.9 Based on 111 Reviews
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Filter Reviews:
    Jeff R.
    United States United States
    • Rider's age in years 5
    • How would you rate the fit? SmallPerfectLarge

    The best 20" bike I have found

    With pandemic bike shortages so prevalent, it was difficult to try many bikes from shops, so I preorded this one months in advance and so glad I did. My 5 year old loves it, and so I love it. It is a better bike by almost every metric to any competing bike I have had a chance to try out (mostly from big box brands like Trek, Cannondale, Giant...) I love the gear range and ease of shifting (it can be hard for little hands!) also the adjustable brake reach is great. All that and it's light enough my tiny 5 year old can pedal herself up hills that she was too scared to even ride down a month ago. This bike has inspired confidence in her growing ability and honestly I can't recommend it enough.

    Gregory E.
    United States United States
    • Fit SmallPerfectLarge
    • Rider's age in years 6

    Alpha 3

    Excellent purchase. An instant hit with my 6 yo. He has been riding for years and is very comfortable - more so than any kid his age so have seen. Stepping up from a specialized kids bike (like 16”), he immediately loved this bike and even got the brakes and the gears without any issue. The whole bike seems built for a kid his size - and I don’t say that lightly as my daughter who is 8 got a Bianchi kids bike last year and this bike is superior. It’s not cheap, but well worth it. Very fast and light as well. It’s not big for him to grow into- seems perfect for his size now. I also like that the seat is easily adjustable. I’ll be getting him the size up when it’s time. 10/10.

    Nandan D.
    United States United States

    2nd Prevelo and equally happy.

    2 years ago, we got our son his first Prevelo, the Alpha One on his 3rd birthday.  Now we were ready for the Alpha Three for his 5th birthday (he's 44" tall, 47lbs).  We called and were told that they were out of stock and supply chain disruptions meant that we would not have one before his 5th birthday.  We were very sorry to hear this, though understandable in the global scheme of things during Covid. A few days later, we received a surprise email from Sarah saying they found one in their stock and it was the exact color we were looking for and were we interested.  Of course we were, we ordered it, and it was delivered exactly as promised. So as usual, Prevelo met and exceeded our expectations when it came to customer care.   The bike itself was great -- beautiful, easy to setup, instructions were obvious and all tools provided.  Our son had no problems riding it right away.  It was easy to handle, at the lowest seat height, he could put both his feet on the ground without any problems which is comforting.  The shifters were also fine, and he can shift both up and down comfortably.  We have gone on 6-7mile bike rides over both paved and unpaved terrain the bike handles all that very well. So bottom line, great bike, great company and good customer care.  

    Prevelo Bikes Alpha Three ReviewPrevelo Bikes Alpha Three ReviewPrevelo Bikes Alpha Three Review
    Steven R.
    United States United States

    Awesome bikes!

    My 6yo loves his new alpha 3, in blue. Super well built, and will last for awhile. Customer service is top notch too. We originally ordered the wrong color, and prevelo took care of us. Recalled the wrong colored bike after it shipped, and sent out the blue one super fast. Happy all around.

    Prevelo Bikes Alpha Three ReviewPrevelo Bikes Alpha Three Review
    United States United States

    BUY IT!!!!!: Best bikes for small kids, awesome customer service

    The Alpha 3 bike is probably the only 20" bike in the market that fits kids with an inseam of 18 inch. My 5 year old has been biking without training wheels since he was 3, so he's been ready for a bigger bike with gears for a long time. After doing some research, I found the Alpha 3, we bought it and I can't be happier. It fits him perfectly and he is the happiest kid in the world.It is also light enough that he can lift it without help. We got the bike with the rapid fire+ shifter as recommended, and it's been great. He got the hand of it pretty quickly. We will not be buying other bikes for our kids. Bike was very easy to put together (literally took us 10 min) and customer service is great, they are very responsive and helpful. We even got a handwritten note with the bike thanking us for buying the bike!!