Alpha Three

Wheel Size: 20"
Age: ~5 to 9 years | Inseam: 19" - 23"
135 reviews
Color
Speed Silver
Power Purple
Braap Blue
Ships on or before Tuesday November 29th
$29 shipping
in the Continental USA
Extended Holiday Returns
Holiday returns extended
to Jan 31, 2023.
Checked and Tuned
Each bike is checked & tuned prior to shipment.
Easy Assembly
Includes all the tools you need & easy instructions.

Loaded with Features Obsessively Thought Out for Kids

9 speed microshift

9 Speed Microshift Drivetrain with Wide Span Gearing

9-speed Microshift drive train and 11-36T wide range gearing is the real deal and gives growing riders truly usable and class leading, 327% gear range. Kids are going to be efficient on the flats and have the leverage of low gears available to help make it up tough hills.

Compared other kids bikes that typically offer 7 or 8 speeds the Alpha Three offers 72% (or more) additional gear range.

bicycle crank

Kid Optimized Crank with Dual-Alloy Guards

Prevelo crank lengths are custom sized for each size bike to make sure little riders have optimum pedal ergonomics. And they have ultra-narrow Q-factors to match the narrow hips of young cyclists. If that sounds like technical mumbo jumbo, here's the point - Prevelo cranks will help make small riders more comfortable and efficient on their bike.

The Alpha Three features industry leading Dual-Alloy Chainring Guards that both protected little fingers from getting caught in the mechanics and protect the chainring from impacts.

kids bike handlebar

Kid Optimized Cockpit

This is where little riders command their steed. It's decked out with ultra thin grips and short reach brake levers that are optimized for small hands. The Microshift shifter is operated with two easy to operate thumb levers.

Confidence Inspiring Geometry

The Alpha Three features Prevelo's signature confidence inspiring geometry. Prevelo geometry utilizes a low bottom bracket that lowers the center of gravity of the bike and rider, making for a more agile and confident ride.


What the Bike Media is Saying

"Punches above ordinary neighborhood bikes."

two wheeling tots

"Exceptional from frame to wheels, brakes to handlebars, the Prevelo Alpha Three is the ultimate ride for young, adventurous riders."


  • 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.
  • MEASUREMENT SPECIFICATION
    Weight (including pedals) 19.1 lbs / 8.6 kg
    Minimum Saddle Height 20.7 in / 525 mm
    Maximum Saddle Height 25.5 in / 648 mm
    Bottom Bracket Height 8.1 in / 205 mm
    Gain Ratio 2.0 - 6.7
    Standover (ground to top of top tube) 17.5 in / 444.5mm
  • bicycle geometry
    MEASUREMENT SPECIFICATION
    A Wheel Size 20"
    B Wheelbase 32.9 in / 835 mm
    C Effective Top Tube Length 17.4 in / 443 mm
    D Head Angle 69°
    E Seat Tube Angle 71.5°
    F Chain Stay Length 13.8 in / 350 mm
  • COMPONENT SPECIFICATION
    FRAME 6061 heat treated aluminum alloy custom formed tubing
    FORK Aluminum alloy blades with chromoly steerer tube - 35mm rake
    SEAT CLAMP Aluminum alloy with toolless adjustment
    FRONT BRAKE Aluminum alloy V-brake
    REAR BRAKE Aluminum alloy V-brake
    FRONT BRAKE LEVER Aluminum alloy
    REAR BRAKE LEVER Aluminum alloy
    REAR DERAILLEUR 9-speed Microshift
    SHIFTER REAR Microshift Thumb Shifter
    FREEWHEEL/CASSETTE 11-36T
    CRANK SET Prevelo anodized alloy 3-piece square taper with 110MM crank length.
    SPROCKET 32T with double chain ring guard
    BB SET Sealed cartridge
    HEAD SET 1 1/8" threadless
    RIM Aluminum with grinded sidewalls
    FRONT HUB Lightweight alloy 1-piece forged CNC
    REAR HUB Lightweight alloy 1-piece forged CNC
    TIRE & TUBE Kenda Small Block Eight Pro 20 ×1.5
    SADDLE Prevelo big kid saddle
    HANDLEBAR Prevelo aluminum big bore - 560mm width x 40mm rise with 31.8mm to 22mm taper
    HANDLEBAR STEM Forged aluminum
    GRIP Kraton rubber
    PEDAL Composite with 9/16 chromoly axle
    * Specifications are subject to change without notice

Customer Reviews
4.9 Based on 131 Reviews
5 ★
91% 
119
4 ★
6% 
8
3 ★
3% 
4
2 ★
0% 
0
1 ★
0% 
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Filter Reviews:
    A
    05/30/2022
    Anonymous
    United States United States
    • How would you rate the fit? SmallPerfectLarge
    • Rider's age in years 6.5

    Our second Prevelo doesn't disappoint

    Moved from Alpha two to this and definitely are the best bikes in entire neighborhood. These might "look" expensive compared to other bikes u see frequently, but trust me, they cost way less than what they feel their real worth is.

    SG
    03/11/2022
    Shelly G.
    United States United States
    • Rider's age in years 5
    • How would you rate the fit? SmallPerfectLarge

    i love this company and this bike

    I'm a bike riding parent. I have a commuter, a mountain bike, and a family cargo bike. My little started with a wooden scoot bike, then balance bike, then pedal bike when he was 3. Those things don't make us unusual. But my little had some developmental delays and weakness and despite high levels of motivation, was a cautious and timid rider. Prevelo makes perfect bikes for us. The components are super high end, the geometry makes it possible for kids to get on and go with little to no practice, and it's so lightweight that it's super manageable. It means kids can have fun on varied terrain (we pump track and mountain bike) and can ride modest hills. When we graduate from the Alpha Two, to the gears on the Alpha Three, we were able to climb more hills together and my 5 year old is thrilled to have the control over the gears! And this company has amazing customer service. I couldn't be happier.

    Prevelo Bikes Alpha Three Review
    JR
    08/10/2021
    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.

    GE
    03/22/2021
    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.

    ND
    06/03/2020
    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.  

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