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Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 6 - Aug 11
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
fixie with gears Unknown SC-1 Yellow – 4130 Chromoly Fixie & Single SpeedUnknown SC 1 Yellow 4130 Chromoly Fixie & Single Speed The Unknown SC 1 Yellow is a tough, reliable fixie built for everyday riding. The deep green finish gives this bike a cool, understated look that works in any setting from campus to city centre. Built from 4130 chromoly steel, the SC 1 is engineered to handle the daily demands of urban commuting while staying comfortable on longer rides. At 9. 4kg in size M, it is one of the lightest steel fixies
Unknown SC-1 Yellow | 4130 Chromoly Fixie & Single Speed
The Unknown SC-1 Yellow is a tough, reliable fixie built for everyday riding. The deep green finish gives this bike a cool, understated look that works in any setting — from campus to city centre. Built from 4130 chromoly steel, the SC-1 is engineered to handle the daily demands of urban commuting while staying comfortable on longer rides. At 9.4kg in size M, it is one of the lightest steel fixies in its class.
Chromoly steel is prized for its strength and natural vibration dampening — it gives you a noticeably smoother ride than aluminum on rough city roads. The steel fork complements the frame with stable, predictable handling you can trust in traffic. The sealed-bearing Mushroom hub wheelset with Japanese bearings ensures effortless rolling ride after ride.
Premium Build
Hardened Unknown SC-1, 4130 chromoly steel.
Full Unknown steel fork, 30mm rake, 1 1/8".
Ultra-light 9.4kg Setup.
Combined Value
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.
Flip-Flop Freedom
Switch between Fixed Gear and Single Speed effortlessly. Our specialized Flip-Flop Hub gives you the best of both worlds.
Born from the underground track scene, Unknown Bikes bridges high-performance track engineering with street-level energy. We focus on the essentials: high-grade materials and minimalist aesthetics. We don't do fluff; we do fast.
Full Component Specifications
| Frame | Unknown SC-1, 4130 chromoly steel |
| Fork | Unknown steel fork, 30mm rake, 1 1/8" |
| Headset | Integrated Unknown, SB, 45x45st., 1 1/8" |
| Stem | Unknown 60mm |
| Handlebars | Unknown riser bars |
| Grip | Unknown |
| Brake levers | ZST single speed |
| Brakes | Unknown front and rear brake set |
| Chainarm | Unknown 165mm, 130BCD |
| Chainwheel | Unknown 46t, 130BCD, 1/2"x1/8" |
| Chain | KMC Z510 1/2"x1/8" |
| Rear cog | 17t |
| Rims | Unknown 28d |
| Hubs | Unknown Fix/Free flip flop 28d, SB |
| Tires | 23c |
| Seatpost | Unknown 27.2mm, 300mm, 20mm offset |
| Saddle | Unknown |
| Bottom bracket | 68x103mm, BSA, Square taper |
📏 Find Your Fit
*Recommendation: If you are between sizes, we recommend sizing down for a more agile urban ride.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy