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 Height 20.7 in / 525 mm
Maximum Saddle Height 25.5 in / 648 mm
Bottom Bracket Height 8.1 in / 205 mm
Gain Ratio 1.9 – 6.7
Standover (ground to top of top tube) 17.5 in / 444.5mm

Geo Diagram

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
Frame 6061 heat treated aluminium alloy custom formed tubing
Fork Aluminium alloy blades with chromoly steerer tube – 35mm rake
Seat Clamp Aluminium alloy with toolless adjustment
Front Brake Tektro aluminium alloy V-brake
Rear Brake Tektro aluminium alloy V-brake
Front Brake Lever Tektro aluminium alloy
Rear Brake Lever Tektro aluminium alloy
Rear Derailleur 9-speed Microshift
Shifter Rear Microshift Thumb Shifter
Freewheel/Cassette 11-36T
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 aluminium with grinded sidewalls
Front Hub Lightweight alloy 1-piece forged CNC
Rear Hub Lightweight alloy 1-piece forged CNC
Tire & Tube Kenda Small Block Eight Pro 20 ×1.5
Saddle Prevelo big kid saddle
Handlebar Prevelo aluminium big bore – 560mm width x 40mm rise with 31.8mm to 22mm taper
Handlebar Stem Aluminium 35mm extension
Grip Kraton rubber
Pedal Composite with 9/16 chromoly axle



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