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

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Signature Urban marco — Gray Edition

The Unknown SC-1 Gray is a tough, confiable fixie built for everyday riding. The sleek gray finish strikes the perfect balance between subtle and stylish — a refined, modern look that blends into any urban environment. Built from 4130 chromoly acero, the SC-1 is designed to handle years of daily commuting without breaking a sweat. At 9.4kg in tamaño M, it is one of the lightest acero fixies in its class.

Built to Last

Chromoly acero is the rider's choice for frames that need to be both strong and comfortable — its natural flex absorbs road vibration, giving you a smoother ride than aluminio over uneven ciudad streets. The acero horquilla delivers steady, confiable handling that inspires confidence in traffic. The sealed-bearing Mushroom buje conjunto de ruedas with Japanese bearings ensures silky smooth rolling on every ride.

Ride Fixed or Single Speed

The SC-1 comes with a flip flop buje, giving you the choice to ride fixed gear or flip the rear rueda for single speed. Ideal whether you are a beginner wanting the safety of coasting, or a seasoned rider who enjoys switching between setups. 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.

peso: 9.4 kg in tamaño M (without pedals and brakes)

*Graphics on the marco may differ slightly from photos.

especificaciones

• marco: Unknown SC-1, 4130 chromoly acero
• horquilla: Unknown acero horquilla, 30mm rake, 1 1/8"
• juego de dirección: Integrated Unknown, SB, 45x45st., 1 1/8"
• Stem: Unknown 60mm
• Handlebars: Unknown riser bars
• Grip: Unknown
• freno levers: ZST single speed
• Brakes: Unknown front and rear freno set
• Chainarm: Unknown 165mm, 130BCD
• Chainwheel: Unknown 46t, 130BCD, 1/2"x1/8"
• cadena: KMC Z510 1/2"x1/8"
• Rear piñón: 17t
• Rims: Unknown 28d
• Hubs: Unknown Fix/Free flip flop 28d, SB
• Tires: 23c
• tija de sillín: Unknown 27.2mm, 300mm, 20mm offset
• sillín: 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

tamaño Chart

marco tamaño	Rider Height
53	155cm – 167cm
55	167cm – 178cm
59	178cm – 190cm
62	190cm – 200cm

``` ### buscar Engine Listing **Page title:** ``` Unknown SC-1 Gray – 4130 Chromoly fixie & Single Speed | EU ``` **Meta descripción:** ``` 🚲 The Unknown SC-1 Gray — tough 4130 chromoly acero fixie & single speed. Flip flop buje, front & rear brakes, riser bars. 9.4kg. Free pedals + free lights included ✓ Fast EU envío ✓ ``` ### Image File Names ``` unknown-sc-1-gray-fixie-side-view.jpg ``` ``` unknown-sc-1-gray-single-speed-front-angle.jpg ``` ``` unknown-sc-1-gray-chromoly-marco-detail.jpg ``` ``` unknown-sc-1-gray-rear-rueda-flip-flop-buje.jpg ``` ``` unknown-sc-1-gray-riser-bars-headtube.jpg ``` ### Image Alt Text ``` Unknown SC-1 Gray 4130 chromoly fixie - full side view ``` ``` Unknown SC-1 Gray single speed bike - front angle view ``` ``` Unknown SC-1 Gray - chromoly acero marco detail closeup ``` ``` Unknown SC-1 Gray fixie - rear rueda and flip flop buje ``` ``` Unknown SC-1 Gray - riser bars and headtube detail"