Unknown LV3

Purple Chameleon

Fixed Gear / Single Speed Track Bike

The Unknown Bikes LV3 is a lightweight aluminium track bike built to ride as a fixed gear or single speed. Its hardened 6066-T6 aluminium frame is paired with a full 12K carbon fork.

The Purple Chameleon colourway uses colour-shifting Unknown logo decals against the frame for a changing purple-toned graphic effect. The flip-flop rear hub uses a 17T fixed cog on one side and the included 16T freewheel on the other. Compare other Unknown LV3 finishes.

8 kg

Approx. weight, size 55
Full Carbon Fork

12K carbon, 30 mm rake
Tapered Head Tube

Integrated tapered design
6066-T6 Frame

Hardened aluminium

Key Features

Purple Chameleon Finish

The Purple Chameleon colourway uses colour-shifting Unknown logo decals against the frame for a changing purple-toned graphic effect.

Unknown LV3 Purple Chameleon full carbon fork detail

Full Carbon Fork

Full 12K carbon fork with a 30 mm rake.

Aero Frame

The hardened 6066-T6 aluminium frame uses the LV3 aero frame profile.

Unknown LV3 Purple Chameleon tapered head tube detail

Tapered Head Tube

The LV3 frame uses a tapered head tube at the front end.

Built for City and Track

The LV3 pairs a hardened 6066-T6 aluminium frame with a full 12K carbon fork and a tapered head tube. Its track-focused layout is designed for responsive urban and track riding.

The drivetrain uses a 46T chainring. Ride fixed with the 17T fixed cog for a 46T × 17T setup, or flip the rear wheel to use the included 16T freewheel for a 46T × 16T single speed setup.

Compact 420 mm drop bars provide multiple hand positions. The bike includes front and rear brakes, pedals and straps, and arrives approximately 90% pre-assembled.

What's Included

Unknown LV3 Purple Chameleon flip-flop hub with included 16T freewheel

Flip-Flop Hub

17T fixed cog on one side, included 16T freewheel on the other.

Unknown LV3 Purple Chameleon front and rear brakes fitted as standard

Front & Rear Brakes

Front and rear brakes fitted as standard.

Pedals + Straps

Included with every complete bike
90% Pre-Assembled

Final assembly required before riding

Specifications

Frame	Unknown LV3, 6066-T6 aluminium
Head tube	Tapered head tube
Fork	Unknown full 12K carbon, 30 mm rake
Hubs	Unknown Fix/Free, 28H, sealed bearing
Chainring	46T, 130 BCD
Fixed cog	17T
Freewheel	16T, included
Handlebars	Unknown Compact 420 mm drop bar
Brakes	Unknown brake set, front and rear
Tyres	23c
Weight	Approx. 8 kg, size 55

Show all specifications

Stem	Unknown 90 mm
Brake levers	ZST single speed
Crank arms	Unknown 165 mm, 130 BCD
Chain	KMC Z510, 1/2" × 1/8"
Rims	Unknown 28H
Seatpost	Unknown 27.2 mm, 300 mm, 20 mm offset
Saddle	Unknown
Bottom bracket	68 × 103 mm, BSA, square taper

Sizing

53152–168 cm
55166–178 cm
58176–185 cm
61183–200 cm

Frame size and recommended rider height. Between sizes? Contact us and we'll help you choose the best fit.

Frame Geometry

Detailed LV3 frame measurements in millimetres. To choose your size, start with the rider-height guide in the Sizing section.

Frame size	S (53)	M (55)	L (58)	XL (61)
Top tube length (C‑C)	535	537	552	573
Seat tube length (C‑T)	530	550	580	610
Seat tube length (C‑C)	482	502	519	539
Head tube length	115	135	150	170
Down tube length	606	606	615	629
Seatstay length	355	355	355	355
Chainstay length	372	372	372	372
BB drop	45	45	45	45

C‑T: measured from the top of the top tube to the centre of the BB shell. C‑C: measured from the centre of the top tube to the centre of the BB shell.

Fixed Gear & Single Speed

A fixed gear bike has the rear cog locked to the hub, so the cranks turn whenever the rear wheel turns. A freewheel single speed lets the rider coast while keeping a single gear ratio.

The LV3 flip-flop hub lets you choose: ride fixed with the 46T × 17T setup, or flip the rear wheel to run the included 16T freewheel for a 46T × 16T single speed setup.

Frequently Asked Questions

Is the Unknown LV3 fixed gear or single speed?

Both. The flip-flop rear hub lets you ride fixed gear with the 17T fixed cog or turn the rear wheel around and use the included 16T freewheel as a single speed.

Does the Unknown LV3 include a freewheel?

Yes. A 16T freewheel is included. The opposite side of the flip-flop hub uses a 17T fixed cog.

How assembled is the Unknown LV3 when delivered?

It arrives approximately 90% pre-assembled. Final assembly is required before riding.

What size Unknown LV3 do I need?

Use the sizing guide above to match your height to the recommended frame size. If you are between sizes, contact us and we'll help you choose the best fit.

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5 Year Warranty

On all frames

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