White Finish
The white finish gives the Bass-X a bright, clean frame treatment for everyday city riding.
Unknown Bass-X
White
Fixed Gear / Single Speed Bike
The Unknown Bass-X combines a hardened 6066-T6 aluminium frame with a full 12K carbon fork and a flip-flop rear hub, giving you the choice of fixed gear or freewheeling single speed.
The white finish gives the Bass-X a bright, clean frame treatment for everyday city riding. The Bass-X uses a more relaxed, upright riding position than the track-focused LV3, while the drivetrain pairs a 46T chainring with a 17T fixed cog and included 16T freewheel.
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8 kg
Approx. weight, size 55
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Full Carbon Fork
12K carbon, 30 mm rake
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City Geometry
More relaxed riding position
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6066-T6 Frame
Hardened aluminium
Key Features
Full Carbon Fork
Full 12K carbon fork with a 30 mm rake.
Relaxed City Geometry
A more relaxed, upright riding position than the track-focused LV3.
420 mm Drop Bar
Compact 420 mm drop bars provide multiple hand positions for city riding.
Relaxed for City Riding
The Bass-X is built around a hardened 6066-T6 aluminium frame with a full 12K carbon fork and a more relaxed, upright riding position than the track-focused LV3. Compact 420 mm drop bars give you multiple hand positions for urban riding.
Ride fixed with 46T × 17T gearing or flip the rear wheel to use the included 16T freewheel for a 46T × 16T single speed setup. The bike includes pedals and straps, front and rear brakes, and arrives approximately 90% pre-assembled.
What's Included
Flip-Flop Hub
17T fixed cog on one side, included 16T freewheel on the other.
Front & Rear Brakes
Front and rear brakes fitted as standard.
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Pedals + Straps
Included with every complete bike
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90% Pre-Assembled
Final assembly required before riding
Specifications
| Frame | Unknown Bass-X, hardened 6066-T6 aluminium |
|---|---|
| Fork | Unknown full 12K carbon, 30 mm rake |
| Hubs | Unknown Mushroom Fix/Free, 28H, sealed bearing |
| Chainring | 46T, 130 BCD |
| Fixed cog | 17T |
| Freewheel | 16T, included |
| Handlebars | Unknown Compact 420 mm drop bar |
| Brakes | Front and rear brake set |
| Tyres | 23c |
| Weight | Approx. 8 kg, size 55 |
Show all specifications
| Headset | Integrated Unknown, sealed bearing, 45×45, 1 1/8" |
|---|---|
| Stem | Unknown 90 mm |
| Brake levers | ZST single speed |
| Crank arms | Unknown 165 mm, 130 BCD |
| Chain | KMC Z510 |
| Rims | Unknown 28H |
| Seatpost | Unknown 27.2 mm, 300 mm, 20 mm offset |
| Bottom bracket | 68 × 103 mm, BSA, square taper |
Sizing
- 52160–172 cm
- 55170–182 cm
- 58180–192 cm
Frame size and recommended rider height. Between sizes? We recommend sizing down for a more agile urban ride.
Frame Geometry
Detailed Bass-X frame measurements in millimetres. To choose your size, start with the rider-height guide in the Sizing section.
| Frame size | S (52) | M (55) | L (58) |
|---|---|---|---|
| Top tube length (C‑C) | 536 | 550 | 564 |
| Seat tube length (C‑T) | 520 | 550 | 580 |
| Seat tube length (C‑C) | 474 | 503 | 532 |
| Head tube length | 110 | 135 | 160 |
| Down tube length | 619 | 629 | 639 |
| Seatstay length | 355 | 355 | 355 |
| Chainstay length | 390 | 390 | 390 |
| BB drop | 55 | 55 | 55 |
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
The Bass-X flip-flop hub lets you ride fixed with a 46T × 17T setup or use the included 16T freewheel for a 46T × 16T freewheeling single speed setup.
Frequently Asked Questions
Is the Unknown Bass-X fixed gear or single speed?
Both. The flip-flop rear hub lets you ride fixed with the 17T fixed cog or use the included 16T freewheel as a single speed.
Does the Bass-X include a freewheel?
Yes. A 16T freewheel is included.
How assembled is the Bass-X when delivered?
It arrives approximately 90% pre-assembled. Final assembly is required before riding.
What size Bass-X do I need?
Use the sizing guide above. If you are between sizes, we recommend sizing down for a more agile urban ride.
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Free EU Shipping
On orders over €500
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5 Year Warranty
On all frames
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Secure Payment
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