Kajen
A nimble short-wheelbase cargo bike for tight streets, stairwells and one good crate of groceries. Rides like a bicycle, carries like a small car.
- Carries up to 60 kg
- 8-speed hub, belt-ready
- Fits a standard bike rack
From€3,400
Nørrebro, København — hand-built since 2011
A cargo bike built around your life, not a catalogue.
We measure, weld and finish every Lumen frame to order — against your routes, your cargo and your children. Twelve weeks in the workshop. Decades on the street.
- Frame welded in-house
- 10-year frame warranty
- Delivered across the EU
Build no. 1 384
In the jig this week
Broen 2.4 · family long-john
Belt drive · box & two child seats
Steel, powder-coated Fjord Green
Belt drive · box & two child seats
Steel, powder-coated Fjord Green
from €4,200
1,400+Bikes on the road
12 weeksAverage build time
10 yearsFrame warranty
48 hoursService turnaround
The workshop
Four benches, two welders, no production line.
Lumen started in a courtyard off Jægersborggade with one torch and a borrowed tube bender. Fourteen years later we still build the same way: one bike at a time, by the people whose names are on the frame.
Nothing here is white-labelled. We bend the tubes, mitre the joints, weld the frames and lace the wheels on Sankt Hans night and every ordinary Tuesday in between. When your bike needs attention in year nine, it comes back to this room — not to a distributor.
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01
Measured, not sized
Reach, saddle height and cargo footprint are calculated from your body and your route, not picked from S–XL.
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02
Repairable by design
Standard bearings, serviceable cables, off-the-shelf rack hardware. Every part can be replaced in a decade.
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03
Materials that age well
Reynolds 631 steel, stainless fasteners and powder coat cured to survive Danish salt for a long, long time.
Mads HolmFounder & frame builder
Frame jig — Broen 2.4Scale 1:12
Drawing rev. 24 · checked by MH
Tube set: Reynolds 631
Three starting points
Every Lumen begins as one of three frames — then becomes yours.
Pick the shape that fits your week. Colours, cargo, gearing and finish are all decided afterwards, with us, over coffee and a tape measure.
Broen
Our most-loved frame. A long-john with a low step-through, room for two children in front and a grown-up's worth of shopping behind them.
- Carries up to 120 kg
- Two child seats + harnesses
- Belt drive, 5-year wear part
From€4,200
Havnen
Built for bakeries, couriers and workshops. Reinforced rear triangle, a flatbed-rated deck and braking that stays honest at 200 kg.
- Rated to 200 kg payload
- Hydraulic disc brakes, 4-piston
- Fleet servicing available
From€5,100
Build it
Configure a Lumen in thirty seconds.
A starting estimate, not a quote — every build is priced properly after we've talked through your routes and your cargo. The deposit is €400, refundable for fourteen days.
Includes assembly, first service and delivery within Denmark. EU shipping quoted separately.
How a Lumen gets made
From first conversation to handover.
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Step 01
Conversation & fit
90 minutes · free
We meet at the workshop or over a call, walk through your week — school runs, deliveries, hills, the width of your stairwell — and decide which frame is worth building.
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Step 02
Design & measurement
1–2 weeks
You receive a drawing of your bike with tube lengths, cockpit reach, cargo footprint and a fixed price. Nothing is charged until you sign it off.
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Step 03
The build
12 weeks
Tube bending, mitring, welding and powder coat. You get photographs from the bench as it moves, and we check in once a month — no silence.
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Step 04
Handover
Half a day
Collect from Nørrebro or have it crated to your door anywhere in the EU. Either way we set the cockpit to your measurements and ride the first kilometre with you.
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Step 05
Service for life
Ongoing
First service at 500 km is on us. After that, 48-hour turnaround at the bench for anything — brakes, bearings, a new harness for a growing child.
Owners
Bought once, ridden daily.
Both children, a week of shopping and a cello fit in one trip. Three winters in and the frame still looks like the day I collected it.
Anna LindqvistBroen 2.4 · Frederiksberg
We replaced a delivery van with two Havnens. Six hundred croissants a morning and the brakes don't flinch at the harbour wind.
Jonas PedersenHavnen × 2 · Nørrebro bakery
What convinced me was the drawing before the invoice. No catalogue, no upsell — just my street, my measurements, and a price that didn't move.
Sofia MeyerKajen · Aarhus
Before you commit
The questions everyone asks.
Anything else, write to us — a person in the workshop answers, usually the same day. Ask a question.
Why does a Lumen cost €4,000 and up?
Because a person bends, mitres and welds your frame for twelve weeks, and because the parts are chosen to still be serviceable in 2036. A €1,500 cargo bike is a different object — usually a mass-produced frame with our name nowhere near it. You are paying for fit, longevity and a workshop that will still answer the phone in a decade.
Can I try one before ordering?
Yes. We keep a Broen and a Havnen in the workshop for test rides, and we run demo days in Copenhagen and Aarhus through spring. Bring your actual cargo — children, dog, bread trays — and ride your actual route if you like.
How does the 10-year frame warranty work?
The frame and fork are warranted against defects in materials and workmanship for ten years to the original owner. Wear parts — tyres, brake pads, belts, cables — are excluded, as you'd expect. If something is our fault, we fix it at the bench and cover the return shipping.
Do you deliver outside Denmark?
We crate and ship anywhere in the EU, and have sent bikes to Berlin, Malmö, Amsterdam and Lisbon. Shipping is quoted with your build, typically €180–€420 depending on distance. You're also very welcome to collect from Nørrebro and ride it home.
What if my needs change — another child, a new job?
The frames are built to be reconfigured. Child seats come off, boxes become flatbeds, racks bolt on. Most owners change the cargo setup at least once in the first five years, and it's an afternoon's work, not a new bike.
How do payments and deposits work?
A €400 deposit reserves your slot and is refundable within fourteen days, no questions asked. Half the balance is due when you approve the drawing, the rest on handover. We invoice in EUR or DKK and take bank transfer or card.
Start a build
Tell us what you carry.
Send a few lines and we'll come back within two working days with the frame we'd recommend, a rough price and the next available build slot. No mailing list, no follow-up sequence.
- WorkshopJægersborggade 42, 2200 København N
- Opening hoursTue–Fri 10–18 · Sat 10–14 · Closed Sun–Mon
- Writebuild@lumencycles.dk · +45 35 55 04 20
- RegistrationLumen Cycles ApS · CVR 32 14 88 07
Thank you — it's with the workshop.
Mads or Ida will reply within two working days with a recommendation and your build slot. If it's urgent, call the bench on +45 35 55 04 20.