Alpha Two

Size Guide
Sizing

Prevelo Bike Sizing

Getting your kids the right size bike is important and, fortunately, also easy. You just need two pieces of information about your little rider:

  • Inseam
  • Rider Experience

Measuring Inseam

  1. Have the rider stand against a wall, hold a book between their legs so that it is firmly against their crotch (the same place their bicycle seat will be).
  2. Measure the distance from the floor to the top of the book.

Rider Experience

Children who are learning are more sensitive to bicycle height than children who already know how to ride a bike. For this reason, our recommendations for bicycle sizing vary slightly based on the experience lever of the rider. The chart below takes into account the fact that experienced riders tend to adapt better to a bike that is slightly larger. For this purpose we categorize young riders as either "Learners" or "Pedalers"

  • Learner: riders who either have not yet learned to ride a pedal bike, or are still frequently putting their feet on the ground while riding.
  • Pedaler: riders who can ride confidently and only put their feet down to stop.
Model Wheel
Size
Approx. Rider Age
(years)
Learner Inseam
(inches)
Pedaler Inseam
(inches)
Alpha Zero 12" 1½ + 9.5 to 13.5
Alpha One 14" 2½ to 4½ 12.5 to 16 12.5 to 16
Alpha Two 16" 3½ to 6 16 to 18 with short seat post
(21.5 to 24 with long seat post)
15 to 17.5 with short seat post
(20.5 to 23.5 with long seat post)
Alpha Three 20" 5 to 9 18 to 23 17.5 to 22.5
Alpha Four 24" 7 to 11 24 to 29 23 to 28
Zulu Three 20" 5½ to 9 21 to 26 20 to 25
Zulu Four 24" 8 to 11 24 to 29 23 to 29

Wheel Size: 16 inches
Approx. Age Range: 3½ to 6 years
In Stock - Ships Free and Fast!

16-Inch Wheels | V-brakes | Single Speed

Optional Short Seat Post + $1:

To comply with CPSC standards, the standard seat post on the Alpha Two is 350MM. With the standard seat post the lowest seat height is 23 inches. With the optional 140MM short seat post the seat height can be lowered to 17.5 inches. The short seat post includes a 6MM hex key for installation.

  • The 16" Alpha Two is the perfect bike for 3.5 to 6 years olds whether they are just learning to ride or are mastering the trails. 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. Tektro front and rear v-brakes with small reach brake levers.
    5. Front and rear hubs with low profile rounded hex bolts and no harsh edged nuts for little legs to knock against.
    6. Three piece crank with squared taper bottom cartridge bearing bottom bracket and ultra narrow Q factor.
    7. Double chain wheel guard.
    8. Custom made cranks. All Prevelo cranks are sized specifically for each model bike, down to the millimeter.
    9. 95% assembled. Just install the handlebar, seatpost and pedals.
  • MEASUREMENT SPECIFICATION
    Weight (including pedals) 14.9 lbs / 6.7 kg (14.5 lbs / 6.6 kg with short seat post)
    Minimum Saddle Height 23.0 in / 585 mm (17.7 in / 450 mm with short seat post)
    Maximum Saddle Height 26.0 in / 660 mm (19.8 in / 502 mm with short seat post)
    Bottom Bracket Height 7.2 in / 182 mm

Components

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 Tektro aluminum V-brake
REAR BRAKE Tektro aluminum V-brake
FRONT BRAKE LEVER Tektro aluminum short reach
REAR BRAKE LEVER Tektro aluminum short reach
CRANK SET Prevelo anodized alloy 3-piece square taper with 95MM crank length.
SPROCKET 25T 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 with low profile rounded hex bolts
REAR HUB Lightweight alloy 1-piece forged CNC with low profile rounded hex bolts - 14T cog freewheel
TIRE & TUBE Kenda Small Block Eight Pro 16 ×1.5
SADDLE Prevelo small kid saddle
HANDLEBAR Prevelo Aluminum - 470mm wide x 50mm rise - 22.2mm to 19mm taper
HANDLEBAR STEM Aluminum 30mm extension
GRIP Kraton rubber
PEDAL Composite with 9/16 chromoly axle

Geometry


MEASUREMENT SPECIFICATION
A Wheel Size 16"
B Wheelbase 28.8 in / 730 mm
C Effective Top Tube Length 15.4 in / 391 mm
D Head Angle 69°
E Seat Tube Angle 69°
F Chain Stay Length 12.1 in / 307 mm

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