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

Signature Urban frame — Yellow Edition

The Unknown SC-1 Yellow is a tough, betrouwbaar fixie built for everyday riding. The bold yellow finish makes a statement on any street and is impossible to miss in traffic — style and safety in one. Built from 4130 chromoly staal, the SC-1 is designed to take the daily grind of stad commuting and keep coming terug for more. At 9.4kg in maat M, it is one of the lightest staal fixies in its class.

Built to Last

Chromoly staal is known for its strength and durability — it absorbs road vibration naturally, giving you a smoother ride than aluminium frames on rough stad streets. The staal vork matches the frame perfectly, providing betrouwbaar handling and a comfortable feel on longer rides. The sealed-bearing Mushroom naf wielen with Japanese bearings keeps everything rolling smoothly day after day.

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 for single speed. Perfect if you are new to fixed gear riding and want the option to coast, or if you just want to switch things up depending on your mood. 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