01
Harley-Davidson Fat Boy
Fatbox
Respect for an icon, at volume.
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United Kingdom
Est. 2011
Built once.Built for one.
Bespoke motorcycles milled from solid aluminium and finished by hand. Harley-Davidson, Ducati and Triumph platforms, rebuilt into something that is entirely yours.
01
Who we are
For 15 years we have taken production motorcycles apart and put back something that should not be possible at this scale.
Ready-made concepts
You do not have to work out which parts to buy to assemble the bike in your head. Each model is a complete, resolved concept — every bracket, every fastener, already solved.
One machine, one owner
Colour, finish, wheel design, carbon pattern. The platform is fixed; almost nothing else is. No two leave the workshop the same.
02
The lineup
Six platforms. No two builds alike.
Each concept is fully resolved — chassis, body and finish developed together rather than bolted on. Choose a platform, then make it yours.
02
Triumph Rocket 3
Agostino
Premium touring, named for a painter.
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03
Ducati X-Diavel
Piombo-X
A limited edition. One button from the museum stand.
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04
Ducati X-Diavel
Aliense
A brutal dragster for uncompromising riding.
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05
Harley-Davidson Milwaukee-Eight
Giotto Altre
A low, elongated dragster on a frame of our own making.
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06
Harley-Davidson Breakout
BreakBox
Classic cruiser stance, modern everything else.
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03
How we do it
Cut from solid, not bent from sheet
We run 5-axis milling for every aluminium and steel component. The machine does not limit the design concept — which is why the fenders, triple clamps and wheel centres look like nothing else on the road.
A fender begins as a billet. It is milled, hand-finished, and married to fibreglass panels that are laid, cut and set by the same people who will bolt them on. There is no production line and no batch — the part is made for the machine it is going on.
We have a real appetite for modern materials and processes: forged carbon, anodised aluminium, air suspension, Öhlins forks, Brembo calipers. Where a better technology exists, it goes in.
5
Axis milling
280
Rear tyre, mm
100%
Hand finished
04
In motion
Nothing here is a render
Shot on the floor on an ordinary morning — several machines in build at once, wheels off the rack, panels still going on. This is the room every BOX39 comes out of.
Individual bikes have their own films on each model page.
A morning on the floor
05
Wells, Somerset
Made here, ridden here
A Fatbox photographed around Wells one evening in August — cathedral green, coaching inn, palace gatehouse. Nine hundred years of stone and a bike built this year.
01 · Cathedral green
02 · The White Hart
03 · Palace wall
04 · Under the limes
Every machine leaves the unit finished, road-legal and photographed before it goes to its owner. The pictures on this page are of bikes that exist, not renders of bikes that might.
06
The workshop
Where they are made
Our UK floor. Every machine here is either going out or coming apart.
25 frames · Photographed in house
07
Commission
Tell us what you want to ride
Every build starts with a conversation about the platform, the finish and how you intend to use it. Lead times and specification are agreed before any metal is cut.