ADULT BIKES

Pre-Order Dates

We do not open pre-orders for a shipment until we have a good amount of confidence in the ship date.  That being said, the estimated delivery dates listed on our website are based on the best information that we have at the moment.  While we cannot control every variable, we pledge to be honest and transparent about lead times.

- The ship dates that are on the website represent our honest estimate of the date that the bikes will ship on.

- Where information is imprecise (for example, referencing a month or quarter), it is because there are unpredictable factors that make it so we cannot credibly be more precise.

- We will work tirelessly to keep the bikes on schedule. It's part of our company culture to be very involved in our supply chain and to be proactive about addressing issues that could turn into delays.

- If something happens that changes the ship date we will communicate quickly and clearly about the delay.

- You can cancel your pre-order any time before your bike ships.


Pre-date changes

Your pre-order date will be included in your order confirmation. If we learn something that changes that date, we will contact you. You might see the pre-order date change on the website. There are a variety of things that could cause a change in the pre-order date including shipping delays, back logs, or moving through different batches. Just because the date on the website changes, does not mean that the date of a pre-order already placed has changed.  Again, if you place a pre-order and the estimated delivery date changes, we will inform you.


Pre-order payment policy

Your credit card will be charged immediately when you place your pre-order.  Your pre-order is cancelable and fully refundable. If you need to cancel a pre-order contact us and we'll take care of it!

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  • "Top Pick" by Two Wheeling Tots

  • NY Product Design Awards | 2026 Gold Winner

Alpha Three MkIII

187 reviews
$759.00
Color: Party Pink
Size
Guide Assembly
Options Assembly
Instructions

At a glance

Use
Streets, paths and light trails
Wheel Size
20 in
Age
5 to 9 years
Type
All-purpose Bike
Weight
16.9 lbs(without pedals)
Inseam
19" to 23"

The Prevelo Alpha Three is a 20-inch kids' bike and the first geared bike in the Alpha range, the step up from the single-speed Alpha Two. Built for confident riders ages 5 to 9, at 16.9 pounds it delivers refined, adult-quality performance: an 8-speed Microshift Acolyte drivetrain with chain retention and hydraulic disc brakes. A Two Wheeling Tots Top Pick, it handles pavement, paths, and light trails with real precision. Fits inseams 19 to 23 inches.

The Most Advanced 20" All-purpose Bike

Packed with mega smart features

Prevelo Bikes - Alpha Three (Outlet) -
Components
FrameLightweight Triple Butted 6061 Aluminum. Low Center of Gravity, Kid Specific Geometry. Internally routed Cables. 3D Forged Dropouts. Dropper Post Compatible.
ForkBladed Aluminum Legs with 1 1/8" Aluminum Steer tube
Seat ClampAluminum Quick Release
BrakesPromax Hydraulic Disc Brakes
DerailleurMicroshift Acolyte Super Short with Springlock chain retention system
Shifter8 speed Microshift Acolyte Quick Trigger w/ Indicator
Freewheel / Cassette8 speed 11-38t Microshift H083
CrankHEIR Lightweight Aluminum 3 piece. Narrow Width, 110mm length
Chainring28T Narrow Wide with aluminum chain ring guard
Bottom Bracket68x113 Hollow Square Taper with Sealed Cartridge Bearings
Headset1⅛" Integrated Threadless Sealed Cartridge
RimsDoublewall Aluminum, tubeless compatible
Front Hub20h Aluminum Sealed Cartridge with Quick Release Skewer
Rear Hub20h Aluminum Sealed Cartridge with Hex Key Skewer
TiresKenda Small Block Eight 20 x 1.5 60 TPI
SaddlePrevelo 1pc Junior
Seat Post⌀31.6mm alloy 1 piece
HandlebarHEIR Riser Lightweight Aluminum 31.8 clamp, 19mm grip 560mm wide, 25mm rise
StemPrevelo 1pc bar/stem with knee friendly design
Grips110mm Black Rubber 19mm diameter Lock-On
PedalsComposite Big Kid, 9/16 LONG Crmo Spindle
VersionMK III
Measurements
Weight16.9 lbs
Recommended Inseam19" to 23"
Minimum Saddle Height21.2 in / 540mm
Maximum Saddle Height26.4 in / 670mm
Gain Ratio1.78 - 6.12
Max Tire Width2.2 in
Geometry
Wheel Diameter20 in
Wheelbase33.62 in / 854 mm
Chain Stay Length13.8 in / 350 mm
Head Angle68°
Seat Tube Angle71.5°
Seat Tube Length11.22 in / 285 mm
Effective Top Tube17.87 in / 454 mm
Bottom Bracket Height8 in / 205 mm
Bottom Bracket Drop1.5 in / 38 mm
Stack16.18 in / 411 mm
Standover16.53 in / 420 mm
Q Factor146mm
Reach12.48 in / 317 mm
Shipping Weights & Dimensions
Box Dimensions46.0 in x 8.3 in x 25.5 in
Shipping Weight24.8 lb

Specifications and components are subject to variations and change without notice.

Hill Conquering Gear Range

The Microshift Acolyte Super Short Derailleur allows the Alpha Series bikes to use an 11-38t cassette. This gives 90% more gear range than other comparable bikes. The clutched cage helps keep the chain from dropping over even the roughest terrain. 

Promax Hydraulic Disc Brakes

Promax hydraulic disc brakes provide young riders with smooth, consistent, and reliable stopping power. Whether navigating steep descents or threading through technical trails, these brakes offer excellent modulation and control, helping kids ride with greater confidence and composure. Designed to perform in a wide range of conditions, they inspire trust in both riders and parents by delivering powerful braking performance when it matters most.

Double Wall Tubeless-Ready Rims

Durable double wall rims provide a strong, stable platform for young riders tackling rough terrain. Tubeless-ready design allows for lower tire pressures, better traction, and fewer flats—ideal for confident riding on trails and beyond.

Kid Centric Control Center and Integrated Handlebar

Short stems, handlebars sized to match shoulder width, easy-to-reach brake levers, and a kid-optimized shifter all come together to give young riders confident control of their bike. The cockpit is thoughtfully designed with an integrated handlebar and stem for a clean, solid setup that reduces weight and potential maintenance points. Recessed bolts minimize snags and scrapes, while the overall layout keeps controls within comfortable reach. Every detail is dialed to help kids stay focused on the ride, not the equipment.

Rider Supply Pod Ready

The Alpha Three features built-in top tube mounting points for securely attaching the Rider Supply Pod. This convenient location keeps essentials like snacks or tools within easy reach for young riders. The mounts provide a clean, strap-free setup that keeps the bag stable and out of the way. Installation requires standard hex bolts for a solid, rattle-free fit. It's a thoughtful detail designed for real-world adventures.

Confidence Inspiring Geometry

Low standover allowing young riders to get on a bigger wheel earlier. Bigger wheels roll faster, offer more traction, and roll over obstacles with less effort. Upright seating position with just enough weight over the front of the bike to maintain control and balance. A low center of gravity that's designed to keep the riders weight "in" the bike, rather than on top. Short chainstays keep the bike agile, while a slack front end keeps things stable at all speeds. 

Kid Friendly Shifting

Microshift builds some of the most thoughtfully engineered shifters for young riders. With compact, easy-to-reach triggers and exceptionally light actuation, this system is designed specifically with smaller hands in mind. The result is a smooth, intuitive shifting experience that empowers kids to ride with confidence and control. By prioritizing ergonomics and usability for youth riders, Microshift delivers a drivetrain interface that feels natural from the very first ride—no awkward reaches, no excessive force, just seamless gear changes tailored to growing cyclists.

Protected Flat Mount Rear Caliper

The flat mount rear brake caliper is positioned snugly between the seat stay and chain stay, shielding it from trail hazards and accidental bumps. This low-profile placement keeps the caliper protected without compromising performance, delivering reliable braking while preserving the clean lines of the frame.

The next step.

What the Press Says about the Alpha Three

The Alpha Series from Prevelo are neighborhood bikes that punch above their intended use. The geometry lends itself to ripping up trails as much as it does flying around the cul-de-sac. Everything is spot on from the tires, to the brakes to the handlebars.

The Bike Dads

For parents interested in introducing gears at an early age, and for kids who have already mastered pedaling and bike handling, the Prevelo Alpha Three is the ideal 20 inch bike.

Rascal Rides

Exceptional - 5 Stars

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

Two Wheeling Tots

Thank the gods, my 7-year-old got her new Alpha Three right out of the box (which came with her name already emblazoned on the shiny steed and took me about ten minutes to assemble), and immediately overcame whatever was previously holding her back. The combination of lighter weight, more optimal kid geometry, and a freewheel hub seemed to do the trick, and alleviate my previous feelings of failing as a father.

Elevations Outdoors

9/10

Excellent specification with size-specific parts and geometry that make it a confident bike to ride for younger riders.

road.cc

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Common questions

How can I teach my child how to shift?

Reach our article on Teaching Children to Shift Gears

How do I adjust my derailleur?

See our derailleur adjustment video here: Derailleur Adjustment

How do I adjust reach on Promax Hydraulic Disc Brake Levers

See the article here: Adjusting Reach on Promax Hydraulic Brake Levers

How much assembly is required?

Prevelo bikes come almost fully assembled. Here are the complete assembly requirements for each bike:


BikeAssembly steps
Alpha Zero(1) attach handlebar to steerer tube, (2) adjust seat height
Alpha One and Alpha Two(1) attach handlebar to steerer tube, (2) attach pedals, (3) adjust seat height
Zulu One(1) attach handlebar to stem, (2) attach pedals, (3) adjust seat height
Alpha Three(1) attach handlebar to steerer tube, (2) attach front wheel, (3) attach pedals, (4) adjust seat height
Zulu Two, Alpha Four, Alpha Five, Zulu Three, Zulu Four, Zulu Five(1) attach handlebar to stem, (2) attach front wheel, (3) attach pedals, (4) adjust seat height


You can view assembly instructions for all bikes here: Assembly Instructions

How quickly do bikes ship?

Each bike's product page shows its expected ship date. In-stock bikes ship promptly from our warehouse, and if a bike is on pre-order, the product page shows the pre-order ship date as well. At checkout you can choose flat-rate ground shipping or expedited 2-day or 1-day express delivery (for Contiguous US).

Full details: Shipping Terms.

Which size bike fits my rider?

Sizing is based primarily on your child's inseam (inner-leg measurement), which is more reliable than age. When a rider falls between two sizes, the smaller wheel is easier to handle and the larger gives more room to grow.

Recommended inseam ranges differ by model, and we keep them current per bike, so use the Bike Chooser for an exact, up-to-date recommendation matched to your child's inseam.

See the Bike Chooser.

What is Prevelo Bikes' return policy?

All Prevelo bikes come with a 30 day Money Back Guarantee. Try it out the bike on a dry surface and if for any reason you don't love it, you can return it to us within 30 days.

Just make sure to hold onto the original packaging until you know it's right.

To learn more about the 30 Day Money Back Guarantee or to return an item, go here: Returns

What is Prevelo Bikes' Warranty?

Every Prevelo comes with the Prevelo Bikes Five Year Limited Warranty. The frame and rigid fork are warranted against defects in material or workmanship for five years from the original date of purchase, to the original owner. Paint finish and all other original components are warranted for one year. Normal wear, and damage from crashes, misuse, neglect, or improper assembly, are not covered.

See the full terms: Prevelo Bikes Five Year Limited Warranty.

More in our Knowledge Base
Prevelo Bikes - Alpha Three (Outlet) -

Alpha Three

$759.00

The Prevelo Alpha Three is a 20-inch kids' bike and the first geared bike in the Alpha range, the step up from the single-speed Alpha Two. Built for confident riders ages 5 to 9, at 16.9 pounds it delivers refined, adult-quality performance: an 8-speed Microshift Acolyte drivetrain with chain retention and hydraulic disc brakes. A Two Wheeling Tots Top Pick, it handles pavement, paths, and light trails with real precision. Fits inseams 19 to 23 inches.

Color

  • Speed Silver
  • Braap Blue
  • Party Pink

Wheel Size

20 in

Type

All-purpose Bike

Use

Paved, dirt paths

Speeds

8

Weight

16.9 lbs

Min Saddle Height

21.2 in / 540mm

Max Saddle Height

26.4 in / 670mm

Wheelbase

33.62 in / 854 mm

Tires

Kenda Small Block Eight 20 x 1.5 60 TPI

Saddle

Prevelo 1pc Junior

Derailleur

Microshift Acolyte Super Short with Springlock chain retention system

Cassette

8 speed 11-38t Microshift H083

Crank

HEIR Lightweight Aluminum 3 piece. Narrow Width, 110mm length

Brakes

Promax Hydraulic Disc Brakes
View product