Radio Cobalt Junior 20" BMX Black/Red

The Cobalt line combines proven geometry and dialed components, giving you the best start out of the gate during your first days racing. The Cobalt Junior steps up in size without packing on the pounds. At only 7.17kg, this is one of the lightest junior entry level bikes out there.


  • Frame: 6061-T6 aluminium.
  • Fork: crmo, 1" butted steerer, hi-ten fork legs.
  • Handlebar: 6061-T6 aluminium.
  • Grips: Radio "Diamond" grips, 130mm long.
  • Stem: Radio "Cobalt" top loading stem, 40mm reach.
  • Headset: FSA "TH-388" 1".
  • Brake lever: Promax "XL-378" aluminium brake rear.
  • Brake: Promax "MV-87" aluminium brake rear.
  • Crank: Radio "Cobalt" forged aluminium 3pc crank, 155mm long.
  • BB: Radio, BSA square taper, sealed.
  • Pedals: Radio "Mini" PC, crmo axle.
  • Chain: KMC Z410 1/2' x 1/8".
  • Sprocket: Radio aluminium, 38t sprocket.
  • Driver: ATA 14t freewheel.
  • Front hub: Radio "Cobalt" aluminium hub, lb, 3/8"s, 28h, crmo axle.
  • Rear hub: Radio "Cobalt" aluminium hub, lb, 3/8"s, 28h, crmo axle, flip flop.
  • Rims: Radio "R450" rim, double wall, 28h.
  • Seat: Radio "Mini" combo seat.
  • Seat post: 22.2mm aluminium.
  • Seat clamp: Radio slim aluminium seat clamp.
  • Tyres: Tioga "Power Block" tyres, 20" x 1 1/8" front & rear.
  • Weight: 7.17g / 15.8lbs.
  • This bike is shipped 90% assembled in a sealed box. Inflation of tyres, fitting of pedals, stem and handlebars, front wheel, front brake cable, saddle and seatpost are necessary. Brakes will require adjustment prior to riding.