6066-T6 Aluminium
A heat-treated 6066-T6 aluminium frame with Unknown graphics on the down tube.
Unknown Paradigm
Frame
Fixed Gear / Single Speed Frame
The Unknown Paradigm frame is a heat-treated 6066-T6 aluminium fixed gear frame with an integrated 45 × 45 head tube, a 27.2 mm seatpost and a 68 mm BSA bottom bracket shell.
It is sold as a frame only, in black or red. The fork, headset and seat clamp are not included.
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6066-T6 Aluminium
Heat-treated frame
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27.2 mm
Seatpost diameter
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68 mm BSA
Bottom bracket shell
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45 × 45, 1 1/8"
Integrated headset standard
Key Features
45 × 45 Head Tube
Integrated head tube for a 45 × 45, 1 1/8" headset. Headset not included.
68 mm BSA Bottom Bracket
A threaded 68 mm BSA bottom bracket shell.
Black or Red
The Paradigm frame is available in black and in red, in sizes 52, 55 and 58.
The Frame Behind the Paradigm
The Paradigm frame is the same heat-treated 6066-T6 aluminium frame used on the Unknown Paradigm complete bikes. It uses common standards: an integrated 45 × 45 head tube for a 1 1/8" steerer, a 27.2 mm seatpost and a 68 mm BSA bottom bracket shell.
Build it up as a fixed gear or a single speed bike with your own choice of parts.
What's Included
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Paradigm Frame
Frame only
Not included: fork, headset and seat clamp. Some photos show the frame with a fork, headset and stem fitted for illustration only.
Specifications
| Frame | Unknown Paradigm, 6066-T6 heat-treated aluminium |
|---|---|
| Included | Frame only |
| Not included | Fork, headset, seat clamp |
| Headset standard | Integrated, 45 × 45, 1 1/8" |
| Seatpost diameter | 27.2 mm |
| Bottom bracket | 68 mm BSA |
| Sizes | 52, 55, 58 |
| Colours | Black, Red |
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 frame can be built as a fixed gear or a single speed bike: the rear hub you choose decides how it rides. A flip-flop hub lets you switch between the two. See the complete Paradigm bikes or other frames.
Frequently Asked Questions
Is a fork included with the Paradigm frame?
No. The Paradigm is sold as a frame only. The fork, headset and seat clamp are not included.
Which parts do I need to build it?
You will need a fork with a 1 1/8" steerer, a 45 × 45 integrated headset, a 27.2 mm seatpost and seat clamp, and a 68 mm BSA bottom bracket, plus wheels, drivetrain and cockpit. If you are unsure about compatibility, contact us.
Which Paradigm size do I need?
The frame 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.
Is the Paradigm also available as a complete bike?
Yes. See the complete Paradigm bikes.
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Free Standard Shipping
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5-Year Frame Warranty
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Secure Payment
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