Prevelo Alpha Three MkIII

Name: Prevelo Alpha Three MkIII
Brand: Prevelo

2025 YouthGeneral youth Manufacturer page

Last known price: $759

Prices shown first for United States
Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 8 28t / 11–38t
Gear range: 345%
Weight: 7.67 kg 16.9 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

One Size

The manufacturer did not publish rider heights for these sizes.

Components

5 of 19 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Lightweight Triple Butted 6061 Aluminum. Low Center of Gravity, Kid Specific Geometry. Internally routed Cables. 3D Forged Dropouts. Dropper Post Compatible. Not identified

Suspension

1 part

Fork

Bladed Aluminum Legs with 1 1/8" Aluminum Steer tube Not identified

Drivetrain

5 parts

Bottom bracket

68x113 Hollow Square Taper with Sealed Cartridge Bearings Not identified
Cassette
- microSHIFT Acolyte H-Series 8 Speed Cassette 11-38 8 speeds 11–38t
Crankset

HEIR Lightweight Aluminum 3 piece. Narrow Width, 110mm length Not identified
Rear derailleur
- microSHIFT Acolyte
Shifters
- microSHIFT Acolyte

Brakes

1 part

Brakes
- ProMax

Wheels and tires

4 parts

Front hub

20h Aluminum Sealed Cartridge with Quick Release Skewer Not identified
Rear hub

20h Aluminum Sealed Cartridge with Hex Key Skewer Not identified
Rims

Doublewall Aluminum, tubeless compatible Not identified
Tires
- Kenda Small Block Eight

Cockpit and contact points

7 parts

Grips

110mm Black Rubber 19mm diameter Lock-On Not identified
Handlebar

HEIR Riser Lightweight Aluminum 31.8 clamp, 19mm grip 560mm wide, 25mm rise Not identified
Headset

1⅛" Integrated Threadless Sealed Cartridge Not identified
Pedals

Composite Big Kid, 9/16 LONG Crmo Spindle Not identified
Saddle

Prevelo 1pc Junior Not identified
Seatpost

⌀31.6mm alloy 1 piece Not identified
Stem

Prevelo 1pc bar/stem with knee friendly design Not identified

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size One Size

Table

Geometry diagram unavailable

The drawing needs head tube length, which the manufacturer did not publish. Available facts remain in the table.

Size Reach Stack

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Reachmm	317
Stackmm	411
Top tube lengthmm	454
Seat tube lengthmm	285
Head tube angle	68°
Seat tube angle	71.5°
Chainstay lengthmm	351
Wheelbasemm	854
Front centermm	506
Bottom bracket dropmm	38
Bottom bracket heightmm	203
Standover heightmm	420
Fork rakemm	35
Stack/reach ratio	1.30

Not published by the manufacturer: Head tube length, Trail, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Aluminum
Bicycle weight: 7.67 kg

16.9 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 28
Largest chainring: 28
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 38
Lowest gear: 14.7 in
Highest gear: 50.9 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire clearance: Maximum tire width: 2.2″
Tire width: 1.5″
Wheel material: Aluminum
Wheel size: 20″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 5.6 km/h
Highest gear: 19.5 km/h

Total gear range 345%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 14.7–50.9 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2025 builds

Differences across 2025 builds
Specification	This bicycle Prevelo Alpha Three MkIII	Prevelo Alpha Five MkIII	Prevelo Alpha Four MkIII	Prevelo Alpha One MkIII	Prevelo Alpha Two MkIII	Prevelo Alpha Zero MkIII
Frame
Bicycle weight	7.67 kg	9.75 kg	8.71 kg	5.13 kg	5.49 kg	3.13 kg
Drivetrain
Front chainrings	1	1	1	1	1	Not informed
Smallest chainring	28	28	28	18	18	Not informed
Largest chainring	28	28	28	18	18	Not informed
Rear sprockets	8	8	8	1	1	Not informed
Smallest sprocket	11	11	11	10	10	Not informed
Largest sprocket	38	38	38	10	10	Not informed
Lowest gear	14.7 in	19.2 in	17.7 in	25.2 in	28.8 in	Not informed
Highest gear	50.9 in	66.2 in	61.1 in	25.2 in	28.8 in	Not informed
Brakes
Brake type	Hydraulic disc	Hydraulic disc	Hydraulic disc	Rim brake	Rim brake	Rim brake
Cockpit
Shifting	Mechanical	Mechanical	Mechanical	No shifting	No shifting	No shifting
Other specifications
Tire clearance	Maximum tire width: 2.2″	Maximum tire width: 2.2″	Maximum tire width: 2.2″	Maximum tire width: 1.5″	Maximum tire width: 2.2″	Maximum tire width: 1.4″
Tire width	1.5″	1.95″	1.95″	1.5″	1.5″	1.4″
Wheel size	20″	26″	24″	14″	16″	12″