Unknown LV3 Black Chameleon | Fixed Gear Track Bike

The Unknown LV3 Black Chameleon is our flagship fixed gear bike, wrapped in a striking chameleon finish that shifts between black, green, and blue depending on the light. Built around a hardened 6066-T6 aluminum frame with aero-inspired track geometry, the LV3 delivers race-level stiffness at just 8kg in size M.

Every component is purpose-built by Unknown for fixed gear riding. The full 12K carbon fork with 30mm rake provides razor-sharp steering and absorbs road vibration — a major upgrade over standard alloy forks. The sealed-bearing Mushroom hub wheelset rolls ultra-smooth thanks to high-grade Japanese bearings, and the 46t/17t gearing gives you an ideal ratio for mixed urban and track riding.

Elite Performance Components

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Every component is purpose-built by Unknown for fixed gear riding. The full 12K carbon fork with 30mm rake provides razor-sharp steering and absorbs road vibration — a major upgrade over standard alloy forks. The sealed-bearing Mushroom hub wheelset rolls ultra-smooth thanks to high-grade Japanese bearings, and the 46t/17t gearing gives you an ideal ratio for mixed urban and track riding.

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The European edition comes standard with our full carbon fork instead of the alloy version. It makes a real difference in performance, comfort, and looks — well worth the upgrade.

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Premium Build

Hardened Unknown LV3, 6066 T6.
Full Unknown Full Carbon Fork,
Ultra-light 8kg Setup.

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Combined Value

LV3 is shipped with drop bars, brakes, and free pedals with foot straps worth €50 included. Ready to ride out of the box.

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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 LV3, 6066 T6
Fork	Unknown Full Carbon Fork, 30mm rake, 1 1/8"
Headset	Integrated Unknown, SB, 45x45st., 1 1/8"
Stem	Unknown 90mm
Handlebars	Unknown Compact 420mm
Grip	Unknown Carbon
Brake levers	ZST single speed
Brakes	Unknown 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 28d, SB — Freewheel not included
Tires	23c
Seatpost	Unknown 27.2mm, 300mm, 20mm offset
Saddle	Unknown
Bottom bracket	68x103mm, BSA, Square taper

📏 Find Your Fit

52 152cm – 168cm

55 166cm – 178cm

58 176cm – 185cm

61 183cm – 200cm

*Recommendation: If you are between sizes, we recommend sizing down for a more agile urban ride.