Concept Thunderbolt FS 20" Wheel Boys Bicycle

Another new junior bike from the clever bike geeks at Insync. This one is a cool customer, the Thunderbolt comes kitted with a front suspension fork designed to soften bumpy terrain. The bike comes equipped with Shimano Microshift gear shifters for rapid gear changing when faced with tough inclines. Designed for the boy bike rider who wants to try some offroad riding. It's fitted with powerful front and rear V-type brakes, alloy rims with mountain bike tyres that will also give a good ride on tarmac surfaces. Finished in a exclusive black colourway with subtle blue decals.


  • Boys Comfort MTB Saddle.
  • Junior non-slip pedals prevent feet slipping off.
  • 20" Wheels.
  • Front Suspension.
  • Adjustable brake levers which can be easily operated by smaller hands.
  • Grips made from a softer dual compound for quality and comfort.
  • This bike features stand out styling on the frame.
  • V Type brakes for an improved braking performance.


  • Frame: Steel 20" Wheel.
  • Fork: 20" MTB Type Suspension Fork.
  • Headset: Steel Full Ball Bearing.
  • B.B Set: 9 pieces.
  • Handlebar: Steel Lo-Rise Bar 540mmL,30 Degree Raise.
  • Stem: Steel Quill MTB Type.
  • Grips: PVC MTB Type.
  • Front Brake: Alloy V brake.
  • Rear Brake: Alloy V brake.
  • Shifter Right: Shimano 6 Spd.
  • Rear Derailleur: Shimano Tourney TZ.
  • Chain: 3/32'' x 1/2'' x 110L.
  • Chainset: Steel 3/32" x 36T.
  • Tyres Front: 20" X 1.90" MTB Pattern.
  • Tyres Rear: 20" X 1.90" MTB Pattern.
  • Rims: 20" Alloy 36 Hole Single wall.
  • Front Hub: Steel 36H.
  • Rear Hub: Steel 36H.
  • Saddle: MTB Type Black.
  • Seat Clamp: M8 x 40mm Bolt.
  • Condition: New in box. 90% built. Inflation of tyres. Fitting of pedals, handlebars/stem and seat post/saddle, adjustments to brake and gear cables required prior to riding. Tools required for assembly: cross head screwdriver, 4/5/6mm allen keys, 15mm spanner for pedals. A generic manual is included but may not include specific assembly instructions. If you are un-able to assemble the bike safely, we recommend that the bike is taken to your local bike mechanic for assembly prior to use.