"Unknown SC-1 Black | 4130 Chromoly fixie & Single Speed"

Signature Urban frame — Black Edition

The Unknown SC-1 Black is a tough, betrouwbaar fixie built for everyday riding. The classic all-black finish is clean, stealthy, and goes with everything — a no-nonsense look for riders who let their riding do the talking. Built from 4130 chromoly staal, the SC-1 is made to take the daily punishment of stad commuting and keep rolling strong. At 9.4kg in maat M, it is one of the lightest staal fixies in its class.

Built to Last

Chromoly staal is trusted for its durability and natural vibration dampening — it delivers a noticeably smoother ride than aluminium frames over bumpy stad roads. The staal vork provides stable, confident handling that you can count on in heavy traffic. The sealed-bearing Mushroom naf wielen with Japanese bearings keeps you rolling smooth every single ride.

Ride Fixed or Single Speed

The SC-1 comes with a flip flop naf, so you can ride fixed gear or flip the rear wiel to switch to single speed whenever you want. Great for beginners easing into fixed gear, or experienced riders who like having both options on one bike. The 46t/17t gearing is well suited for flat urban riding.

What's Included

Shipped with front and rear brakes, and free pedals with foot straps worth €50 included. Plus free front and rear lights worth €20 included. Ready to ride straight out of the box.

gewicht: 9.4 kg in maat M (without pedals and brakes)

*Graphics on the frame may differ slightly from photos.

specificaties

• frame: Unknown SC-1, 4130 chromoly staal
• vork: Unknown staal vork, 30mm rake, 1 1/8"
• koplager: Integrated Unknown, SB, 45x45st., 1 1/8"
• Stem: Unknown 60mm
• Handlebars: Unknown riser bars
• Grip: Unknown
• rem levers: ZST single speed
• Brakes: Unknown front and rear rem set
• Chainarm: Unknown 165mm, 130BCD
• Chainwheel: Unknown 46t, 130BCD, 1/2"x1/8"
• ketting: KMC Z510 1/2"x1/8"
• Rear tandwiel: 17t
• Rims: Unknown 28d
• Hubs: Unknown Fix/Free flip flop 28d, SB
• Tires: 23c
• zadelpaal: Unknown 27.2mm, 300mm, 20mm offset
• zadel: Unknown
• Bottom bracket: 68x103mm, BSA, Square taper

Best Use Cases

✅ Daily urban commuting
✅ Fixed-gear / Single-speed riding
✅ First fixie for beginners
✅ Long rides with friends

maat Chart