Fillet-Brazed Chromoly
Double-butted 4130 Chromoly steel absorbs cobbles far better than brittle aluminum and can be repaired decades from now. We coat every interior tube with cavity wax before shipping.
Refshaleøen Bespoke Atelier
Built for twenty Copenhagen winters.
Hand-brazed 4130 Chromoly cargo bikes built to individual specification in our harbor workshop. Engineered for effortless daily loads, silent belt drives, and decades of North Sea weather.
4130 Chromoly · Smoked Oak · Rohloff 14-sp + Gates Belt
210 kg Max Payload
Hand-Brazed in Refshaleøen
Individual frame jig, Copenhagen harbor
Triple-Powder Marine Coat
Zinc primer + baked architectural finish
Zero-Chain Maintenance
Gates CDX Carbon Belt & sealed hubs
Tested to 210 kg Gross
ISO 4210 & DIN 79010 cargo certified
EU Insured Delivery
Ready-to-ride wooden crate shipping
Engineering Breakdown
Why a €4,000 cargo bike rides differently in year ten.
Cheap cargo bikes rattle, flex under load, and rust inside the bottom bracket after three winters. Click any numbered callout on the blueprint to inspect our tolerances.
DWG NO. LC-2025-A · SCALE 1:10
TOLERANCE ±0.2 MM
Click pins 01–05 to inspect engineering notes
CAD REV 4.2
01 / Precision Rod Steering
Sealed-bearing linkage with zero speed wobble
Instead of cable systems that stretch in winter, we machine a stainless-steel pushrod riding on oversized Japanese SKF ball joints. Steering feels crisp and predictable at 5 km/h with two kids aboard or at 30 km/h empty.
Joint HardwareSKF Sealed Spherical
Turning Radius2.3 m (Tight Alley)
Service Interval5 Years / 15,000 km
Atelier Configurator
Commission your custom build.
Every Lumen frame is assigned a workshop serial number upon deposit. Select your platform, powder coat finish, cargo deck, and drivetrain below.
Atelier Long-John
Batch 14 · 7 Weeks
Finish
Nordic Pine
Total Weight
34.8 kg
Drivetrain
Bosch + Enviolo
€4,390
Incl. 25% Danish VAT · €400 refundable build deposit
1. Frame Architecture
4130 Chromoly2. Powder-Coated Finish
Marine Zinc Primer3. Cargo Bay Specification
FSC Certified4. Assist & Drivetrain
Gates Carbon Belt5. Atelier Additions
Fitted Before DeliveryMaterial Provenance
Honest steel, Danish timber, repairable parts.
We refuse proprietary plastic fairings and glued-shut batteries. Every bolt on a Lumen bike uses standard metric hex hardware you can service anywhere in Europe.
Kiln-Dried Danish Oak
Our cargo boxes are milled in Funen from FSC-certified oak and finished with raw cold-pressed linseed oil. Scuffs sand out in ten minutes and gain character like a boat deck.
Silent Belt & Sealed Hubs
No greasy chain, no bent derailleur hangers, no frozen winter cables. Gates Carbon Belts run silent in pouring rain and pair seamlessly with Bosch or Rohloff drivetrains.
Field Reports
Trusted across Copenhagen.
Over 450 bespoke Lumen frames are currently on the bike lanes of Østerbro, Vesterbro, Aarhus, and Hamburg.
“We sold our second car the week our Atelier Long-John arrived. Three winters of Amager wind and daily daycare runs later, not a single creak or rusted bolt.”
“The steering geometry is night-and-day compared to mass-market cargo bikes. Even loaded with 60 kg of sourdough crates, it corners like a track bike.”
“I chose the mechanical Pinion build because I wanted zero screens and zero obsolescence. Visiting the Refshaleøen workshop to pick my paint swatch sold me instantly.”
Visit the Atelier
Refshalevej 167B, Copenhagen
Our showroom sits right inside our welding bay. Test ride every frame size over harbor cobbles, inspect raw Chromoly tubing, and choose your timber grain in person.
Atelier Hours
Tue–Fri 10:00–17:30
Sat 10:00–15:00
Direct Workshop
atelier@lumencycles.dk
+45 31 48 92 10
Questions
Transparent answers before you commission.
Reserving a workshop slot locks your frame batch with a €400 refundable deposit. You may adjust paint, box, or drivetrain specs for 14 days while tubing is prepared. The remaining balance is due only when your bike passes final QC inspection before handover or dispatch.
Yes. We ship fully assembled bikes in reusable wooden crates across the EU, UK, and Norway (€195 flat rate). You unbolt four crate latches, straighten the handlebar with an included 5 mm hex key, and ride immediately.
Yes—this is a core design principle. Bosch Cargo Line, Shimano EP8, Magura brakes, Gates belts, and Rohloff hubs are standard European workshop components. Any certified Bosch/Shimano dealer can run diagnostics and routine maintenance.
Yes. We issue VAT-compliant invoices for companies, architectural studios, and Danish municipal cargo grants, and offer custom frame decals and lockable aluminum boxes for fleets of 2+ bikes.