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Key featuresexpand_more

The excitement of a new bike when you’re young is a feeling you never forget. Carefully designed by cycling experts, the Relic 20 is a lightweight option with a perfect geometry for growing riders.


Made from high-quality parts that have been scaled down to suit young cyclists, the bike performs as well as adult bikes with powerful brakes, grippy tyres, a smooth drivetrain and shock-absorbing suspension forks.

The Polygon Youth Series is dedicated to creating bikes for every child to have an enjoyable riding experience and spark future adventures on their bikes.

About Polygon

Polygon are a world-renowned bike manufacturer with over 25 years of cycling expertise. Producing close to a million bikes a year out of their state-of-the-art manufacturing facilities, their commitment to innovation and craftsmanship has seen them pick up numerous industry awards and become the brand of choice for leading professionals. You’ll be in good company when you ride a Polygon.


  • Lightweight and reliable kids’ mountain bike
  • Frame: AL6 Rigid Frame
  • Dropout: Alloy QR Dropout
  • Fork: Suspension Fork 40mm Travel
  • Handlebar: Steel Handlebar
  • Stem: Alloy Handle Stem
  • Grips/Bar Tape: Rubber Grip
  • Head Set: External Cup (EC) Cartridge Bearing for Normal Head Tube
  • Saddle: Polygon Saddle
  • Seat Post: Alloy Seatpost
  • Seat Clamp: QR Seat Clamp
  • Chainset: Alloy 32T with Double Chain Guard
  • Pedal: PP Pedal with Reflector
  • BB Set: 5-Piece 68x124mm
  • Chain: KMC C30
  • Cassette: Shimano MF-TZ500 14-28T
  • Shifting Lever – Right: Shimano Tourney, 1x6 Speed Trigger
  • Rear Derailleur: Shimano Tourney RD-Ty21 Direct Attach
  • Front & Rear Tyres: Deli 20” X 2.00”
  • Rims: Alloy Double Wall 32H
  • Front Hub: Alloy Front Hub
  • Rear Hub: Alloy Rear Hub
  • Front & Rear Brakes: Mech D-Brake


Please note: some minor specification changes may occur without notice. Any changes will use equivalent or higher quality parts.


Building your bike: Bikes purchased online are delivered boxed and will require assembly before they can be used. View the GO Outdoors Bike Assembly guide for more info, including step-by-step and video instruction guides.


We are happy to assemble your bike for FREE at any GO Outdoors store with a bike servicing department (this excludes all GO Express stores, and selected other GO locations). Please call ahead to confirm that you would like us to build your bike. You can find store details and phone numbers here. Every bike sold also comes with FREE 6 week safety check.


Can't get to a GO store? Our partners at LeisureLakes bikes will also assemble and inspect any new bikes purchased from our website. You can book a LeisureLakes appointment here.


Warranty and Returns info: Unfortunately, we are not able to process faulty or warranty bike returns through our warehouse. If your bike develops a fault please contact your nearest GO Outdoors store with a bike servicing department where they will be able to help you. Please call to discuss and book an appointment before you go to store. You can find store details and phone numbers here.

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5.00 out of 5

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5 out of 5

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Brilliant bike
5 out of 5

Bought for grandson for Christmas. My son put the bike together easy enough and said it was a really good bike, well worth the money. I can’t wait for my grandson to open it at Christmas.

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