Ghyllside Cycles

Ghyllside Cycles

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Alpha Three 20″ Wheel Kids Bike

£549.95 VAT included

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The 20″ Alpha Three is our smallest geared bike. The NEW 9-speed Microshift drive train and 11-36T 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 aluminium frame with custom formed tubing.
  • Lightweight aluminium alloy fork with chromoly steerer.
  • Tektro front and rear v-brakes.
  • Lightweight Allen head front and rear wheel skewers for secure wheel installation.
  • 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 millimetre.
  • NEW Microshift 9-speed drivetrain. Uses 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 smaller cage derailleurs to keep things high and away from the ground.
  • Microshift Trigger Shifters. Small hands have a hard time using twist shifters. We use reliable silky smooth thumb shifters. They are easy for small hands to operate, and operate just like shifters on high performance bikes.
  • 95% assembled. Just install the handlebar, seatpost, front wheel and pedals.
Weight (including pedals)18.9 lbs / 8.6 kg
Minimum Saddle Height20.7 in / 525 mm
Maximum Saddle Height25.5 in / 648 mm
Bottom Bracket Height8.1 in / 205 mm
Gain Ratio1.9 – 6.7
Standover (ground to top of top tube)17.5 in / 444.5mm

Geo Diagram

A Wheel Size20″
B Wheelbase32.9 in / 835 mm
C Effective Top Tube Length17.4 in / 443 mm
D Head Angle69°
E Seat Tube Angle71.5°
F Chain Stay Length13.8 in / 350 mm
Frame6061 heat treated aluminium alloy custom formed tubing
ForkAluminium alloy blades with chromoly steerer tube – 35mm rake
Seat ClampAluminium alloy with toolless adjustment
Front BrakeTektro aluminium alloy V-brake
Rear BrakeTektro aluminium alloy V-brake
Front Brake LeverTektro aluminium alloy
Rear Brake LeverTektro aluminium alloy
Rear Derailleur9-speed Microshift
Shifter RearMicroshift Thumb Shifter
Crank SetPrevelo anodized alloy 3-piece square taper with 110MM crank length.
Sprocket32T with double chain ring guard
Bb SetSealed cartridge
Head Set1 1/8″ threadless
Rimaluminium with grinded sidewalls
Front HubLightweight alloy 1-piece forged CNC
Rear HubLightweight alloy 1-piece forged CNC
Tire & TubeKenda Small Block Eight Pro 20 ×1.5
SaddlePrevelo big kid saddle
HandlebarPrevelo aluminium big bore – 560mm width x 40mm rise with 31.8mm to 22mm taper
Handlebar StemAluminium 35mm extension
GripKraton rubber
PedalComposite with 9/16 chromoly axle



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