The 20" Alpha Three is our smallest geared bike. The 8-speed Shimano drive train and 11-34T wide range gearing is the real deal and gives growing riders truly usable gear range. It features:
Prevelo confidence inspiring low and narrow geometry. Prevelo geometry keeps the rider low, balanced and in control.
Lightweight 6061 aluminum frame with custom formed tubing.
Lightweight aluminum alloy fork with chromoly steerer.
Tektro front and rear v-brakes.
Quick release front and rear wheels for toolless wheel removal.
Three piece crank with squared taper cartridge bearing bottom bracket and ultra narrow Q factor.
Custom made cranks. All Prevelo cranks are sized specifically for each model bike, down to the millimeter.
Shimano ALTUS 8-speed drivetrain. This 8-speed derailleur has a SHIMANO Smart cage. This unique pulley cage permits the use of 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 Smart cage derailleurs to keep things high and away from the ground.
Shimano ACERA RAPIDFIRE Plus Shift Lever. Small hands have a hard time using twist shifters. We use reliable silky smooth thumb shifters. They are easy for small hands to operate, have an indicator display, and operate just like shifters on high performance bikes.
95% assembled. Just install the handlebar, seatpost, front wheel and pedals.
Specifications
MEASUREMENT
SPECIFICATION
Weight (including pedals)
18.9 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
2.2 - 6.7
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
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 alloy V-brake
REAR BRAKE
Tektro aluminum alloy V-brake
FRONT BRAKE LEVER
Tektro aluminum alloy
REAR BRAKE LEVER
Tektro aluminum alloy
REAR DERAILLEUR
8-speed Shimano Altus double servo with Smart cage
SHIFTER REAR
Shimano Acera RAPIDFIRE Plus
FREEWHEEL/CASSETTE
Shimano 11-34T
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 with quick release
REAR HUB
Lightweight alloy 1-piece forged CNC with quick release
TIRE & TUBE
Kenda Small Block Eight Pro 20 ×1.5
SADDLE
Prevelo big kid saddle
HANDLEBAR
Prevelo aluminum big bore - 580mm width x 40mm rise with 31.8mm to 22mm taper
HANDLEBAR STEM
Aluminum 35mm extension
GRIP
Kraton rubber
PEDAL
Composite with 9/16 chromoly axle
Trying to decide between the Alpha Three and the Zulu Three? Click here to learn the difference: Alpha Series vs. Zulu Series
Kickstand
Custom sized for the Prevelo Alpha Three
If you order a kickstand with a bike, it will come installed on the bike
Lightweight aluminium alloy
Non-corrosive, solid non-porous casting
Dual spring pressure plate and snap action mechanism with hardened steel pivot pin
Non-slip clamping surface
Made in USA
Custom Color Grips
Customize your new Prevelo with grips in the rider's favorite color. Made for Prevelo out of 100% silicone by ESI in the USA. We will install the grips on your Alpha Three before shipping.
Rider Name Lettering
Custom cut out of 2.5 mil vinyl right here at Prevelo HQ in California and applied to BOTH seatstays before shipment.
With a bit of work the decal can be removed when it comes time to hand the bike down.
