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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Alpha Five MkIII

15 reviews
$859.00
Color: Speed Silver
Size
Guide Assembly
Options Assembly
Instructions

The Alpha Five Mk III is a robust, 26″ geared bike built for adventurous riders ages 9 to 13. It’s designed for paved routes, paths, and light trails—offering youth-tailored performance with serious trail cred.

Key features:

  • 8‑speed Microshift Acolyte drivetrain with wide 11–38 T cassette and clutched derailleur
  • Promax hydraulic disc brakes for smooth, reliable stopping power
  • Tubeless capable double-wall 26″ rims
  • Kenda Small Block Eight tires
  • Rider Supply Pod mounts for quick-access snacks or tools
  • Kid‑optimized HEIR crankset and narrow Q-factor for efficient pedaling

Mk III upgrades over Mk II:

  • Hydraulic disc brakes
  • Clutched Microshift derailleur for better chain security on rough terrain
  • Tubeless-ready rims for fewer flats and enhanced traction
  • Rider Supply pod mounts for strap-free gear carrying

At 21.5 lb, the Alpha Five Mk III fuses agility, gear range, and build quality—perfect for tweens who are ready to explore beyond the sidewalk.

The Most Advanced 26" All-purpose Bike

Packed with mega smart features

Prevelo Bikes - Alpha Five - Speed Silver
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
Freewheel / Cassette8 speed 11-38t Microshift H083
CrankHEIR Lightweight Aluminum 3 piece. Narrow Width, 152mm 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 Hub28h Aluminum Sealed Cartridge with Quick Release Skewer
Rear Hub28h Aluminum Sealed Cartridge with Hex Key Skewer
TiresKenda Small Block Eight 26 x 1.95 Folding 60 TPI
SaddlePrevelo 1pc Junior+
Seat Post⌀31.6mm alloy 1 piece
HandlebarLightweight Aluminum 31.8, 640mm wide, 25mm rise
StemLightweight Aluminum 31.8, 35mm Extension
Grips130mm Black Rubber 22.2mm diameter Lock-On
PedalsComposite Junior, 9/16 Crmo Spindle
VersionMK III
Measurements
Weight21.5 lbs
Recommended Inseam25" to 30"
Minimum Saddle Height28 in / 712mm
Maximum Saddle Height33.8 in / 860mm
Gain Ratio1.66 - 5.71
Max Tire Width2.2 in
Geometry
Wheel Diameter26 in
Wheelbase40.75 in / 1035 mm
Chain Stay Length16.9 in / 430 mm
Head Angle68°
Seat Tube Angle74°
Seat Tube Length14.57 in / 370 mm
Effective Top Tube20.82 in / 529 mm
Bottom Bracket Drop1.9 in / 48 mm
Stack20.39 in / 518 mm
Standover22.44 in / 570 mm
Q Factor141mm
Reach14.96 in / 380mm
Shipping Weights & Dimensions
Box Dimensions53.5 in x 8.3 in x 26.9 in
Shipping Weight30.4 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.

Tubeless Capable Double Wall 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.

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.

Rider Supply Pod Ready

The Alpha Five 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. 

Onward.

What the Press Says about the Alpha Five

Exceptional - 5 Stars

Fast, versatile and fun, the Alpha Five is sure to be an instant hit with your tween. With its impressively lightweight build, wide gear range, and kid-specific narrow build, the Alpha Five is just as capable on long paved bike rides as it is on basic dirt trails. Compared to other brands, the Prevelo is truly the best “all-arounder” and is our top pick for the true all-terrain kid ready for adventure."

Two Wheeling Tots

Just superb.

The Bike Dads

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Prevelo Bikes - Alpha Five - Speed Silver

Alpha Five

$859.00

The Alpha Five Mk III is a robust, 26″ geared bike built for adventurous riders ages 9 to 13. It’s designed for paved routes, paths, and light trails—offering youth-tailored performance with serious trail cred.

Key features:

Mk III upgrades over Mk II:

At 21.5 lb, the Alpha Five Mk III fuses agility, gear range, and build quality—perfect for tweens who are ready to explore beyond the sidewalk.

Color

  • Speed Silver
  • Braap Blue
  • Party Pink

Wheel Size

26 in

Type

All-purpose Bike

Use

Paved, dirt paths

Speeds

8

Weight

21.5 lbs

Min Saddle Height

28 in / 712mm

Max Saddle Height

33.8 in / 860mm

Wheelbase

40.75 in / 1035 mm

Tires

Kenda Small Block Eight 26 x 1.95 Folding 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, 152mm length

Brakes

Promax Hydraulic Disc Brakes
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