Unknown SC-1 Fixie Bike - Red


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Features Unknown SC-1 Fixie Bike - Red

Chromoly frame and fork Chromoly frame and fork
Front and rear brake included Front and rear brake included
Flip-Flop Rear Wheel Flip-Flop Rear Wheel
Durable Durable

Details Unknown SC-1 Fixie Bike - Red

  • Frame: Unknown SC-1, 4130 cromo steel 
  • Fork: Unknown steel fork, 30mm rake, 1 1/8"
  • Headset: integrated Unknown, SB, 45x45st., 1 1/8"
  • Stem: Unknown 60mm
  • Handlebars: Unknown raiser bars
  • Grip: Unknown
  • Brake levers: ZST single speed
  • Brakes: Unknown brake set
  • Chainarm: Unknown 165mm, 130BCD
  • Wheelchain: Unknown 46t, 130BCD, 1/2"x1/8"
  • Chain: KMC Z510 1/2"x1/8"
  • Rear cog: 17t
  • Rims: Unknown 28d
  • Hubs: Unknown Fix/Free 28d, SB - Freewheel not included
  • Tires: 23c
  • Seatpost: Unknown 27.2mm, 300mm, 20mm offset
  • Saddle: Unknown
  • Bottom bracket: 68x103mm, BSA, Square tapper
  • Weight: 9.4Kg (size M, without pedals)
  • Pedals with foot straps included


You should know one thing before you buy this bike – it is indestructible. You will get bored of this bike before you see the effects of time on it. The Unknow SC-1 is a shockproof bike. With a 4130 chromoly steel frame this is a bike that will stand up to the rattling of the worst paved streets in your city and all the tricks you want to do with it.

You'd think that all this strength would result in a hefty weight, but it doesn't – it's a very modest 9.4kg in size M. The components of the Unknown SC-1, except for the chain, are all manufactured by Unknown itself, a genuine sign of quality and strength.

About Unknown Bikes

Unknown is a bicycle and component brand, based in Prague, Czech Republic, specialising in fixed gear that combines high performance and quality with a minimalist, clean and modern look in all its bike models.

Unknown have are committed to fixie bikes because of their minimalist appeal, unique and exciting riding experience and aesthetic flexibility. They will make your bike really feel like an extension of yourself.

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