Drop Bars
Unknown Compact 420 mm drop bars on a 90 mm stem, with ZST single-speed brake levers.
Unknown Paradigm
Red
Fixed Gear / Single Speed Bike
The Unknown Paradigm is built around a heat-treated 6066-T6 aluminium frame and a carbon fork, with drop bars, front and rear brakes and a flip-flop rear hub.
This is the Red version. See all Paradigm models.
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6066-T6 Aluminium
Heat-treated Paradigm frame
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Carbon Fork
Aluminium steerer, 30 mm rake
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Drop Bars
Unknown 420 mm compact, 90 mm stem
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46T × 17T
165 mm cranks, 130 BCD
Key Features
46T × 17T Drivetrain
165 mm cranks with a 46T chainring and a KMC Z510 chain on a 68 mm BSA bottom bracket.
Flip-Flop Rear Hub
A 17T fixed cog on one side and a threaded side for the included single-speed freewheel.
Saddle & Seatpost
An Unknown saddle on a 27.2 mm, 300 mm seatpost.
Aluminium Track Geometry for the City
The Paradigm pairs a heat-treated 6066-T6 aluminium frame with a carbon fork on an aluminium steerer. The front end uses Unknown Compact 420 mm drop bars on a 90 mm stem, with ZST levers for the front and rear brakes.
The drivetrain runs a 46T chainring on 165 mm cranks and a 17T cog on a flip-flop rear hub, so the same bike can be ridden fixed or with the included single-speed freewheel. WTB ThickSlick 23c tyres on 28H rims complete the build.
What's Included
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Pedals + Foot Straps
Included with the bike
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Single-Speed Freewheel
For the threaded side of the flip-flop hub
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Front & Rear Brakes
Fitted as standard
Specifications
| Frame | Unknown Paradigm, 6066-T6 heat-treated aluminium |
|---|---|
| Fork | Carbon, aluminium steerer, 30 mm rake, 1 1/8" |
| Handlebars | Unknown Compact drop bars, 420 mm |
| Brake levers | ZST single speed |
| Brakes | Unknown, front and rear, fitted |
| Chainring | 46T, 130 BCD |
| Rear cog | 17T fixed |
| Rear hub | Flip-flop (fix/free) |
| Tyres | WTB ThickSlick 23c |
Show all specifications
| Headset | Integrated, 45 × 45, 1 1/8" |
|---|---|
| Stem | Unknown 90 mm |
| Crank arms | 165 mm, 130 BCD |
| Chain | KMC Z510, 1/2" × 1/8" |
| Freewheel | Single speed, included |
| Rims | 28H |
| Seatpost | 27.2 mm, 300 mm |
| Saddle | Unknown |
| Bottom bracket | 68 × 103 mm, BSA, square taper |
Frame Geometry
| Size | Top tube | Seat tube | Chainstay | HT° | ST° |
|---|---|---|---|---|---|
| 52 | 558 | 520 | 387 | 74° | 75° |
| 55 | 567 | 550 | 387 | 74° | 75° |
| 58 | 582 | 580 | 387 | 74° | 75° |
Paradigm frame geometry. Lengths in mm; HT° and ST° are the head tube and seat tube angles. Compare the top tube and seat tube with a bike that fits you, or contact us for sizing help.
Fixed Gear & Single Speed
The Paradigm has a flip-flop rear hub: a 17T fixed cog on one side, and a threaded side for the single-speed freewheel, which is included. Turn the rear wheel round to switch between riding fixed and freewheeling. See all Paradigm models or other fixed gear bikes.
Frequently Asked Questions
Is the Unknown Paradigm fixed gear or single speed?
Both. The flip-flop rear hub has a 17T fixed cog on one side. A single-speed freewheel is included for the other side.
What comes with the Paradigm complete bike?
Front and rear Unknown brakes are fitted. The bike also comes with pedals and foot straps, and a single-speed freewheel for the flip-flop hub. It is built with Unknown Compact 420 mm drop bars on a 90 mm stem.
Which Paradigm size do I need?
The Paradigm comes in 52, 55 and 58. Use the frame geometry above and compare the top tube and seat tube with a bike that fits you. If you are unsure, contact us before ordering.
Can I buy the Paradigm frame on its own?
Yes. The Unknown Paradigm frame is sold separately as a frame only, in black or red.
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Free Standard Shipping
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5-Year Frame Warranty
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