Signature Frame

SC-1 is the newest bike in Unknown bicycle range. They are made from 4130 cromo steel and they are built to last. This bike is perfect for daily commuting and long rides with friends. Available in 6 colors: black, white, gray, green, yellow and red.

Bicycle Components

Unknown Bicycles SC-1 Frame is made of 4130 cromo steel.  The fork Unknown steel fork with 1 1/8” neck and features a 30mm rake. The headset is an integrated SB, 45x45. The fixed gear bike frame uses a 60mm stem and Unknown raiser handlebars. This bike includes front and rear brake set. The chain arm is 165mm and 130 BCD. The chain wheel is our Unknown 46 tooth, 130 BCD, at 0.5 x 1.125”. The rear cog has 17 teeth. The seat post and saddle are made by us at Unknown. The seat post measures 27.2mm x 300 mm with a 22mm offset. Included rims are Unknown fixed gear 28d rims. The bottom bracket is 68x103mm, BSA with a Square tapper.

Weight

in size M is 9,4kg | without pedals and brakes 

making this bike one of the lightest in class! 

Shipping

SC-1 Fixed Gear Bicycle is shipped with front and rear brake set.

Specifications

• 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
• Tires:  23c
• Seatpost: Unknown 27.2mm, 300mm, 20mm offset
• Saddle: Unknown
• Bottom bracket: 68x103mm, BSA, Square tapper   

NOTE: Bicycle comes without a freewheel. Stock fixed gear option only!

Size Chart 

• Size 53 155cm - 167cm
• Size 55 - 167cm - 178cm
• Size 59 - 178cm - 190cm
• Size 62 - 190cm - 200cm