
I worked in a Chinese Carbon Factory
YANGMFG
March 10, 2026

Light Bicycle
The video is a factory tour of Light Bicycle's manufacturing facility in Shenzhen, China, showing the complete process of carbon wheel production from raw materials to finished wheels. It reveals Light Bicycle as both a brand and factory controlling all aspects of design, engineering, layup, and manufacturing under one roof. The video emphasizes the company's hands-on approach, quality control processes, and unique company culture.
Key Facts
- Factory location: Shenzhen, China
- Company structure: Both brand and factory controlling everything under one roof
- Materials used: Carbon fiber prepreg (pre-impregnated with resin)
- Layup thickness: Each carbon fiber layer is 0.1 mm thick
- Mold weight: Each wheel mold weighs 300-400 lbs
- Curing pressure: Molds are pressurized to 200 PSI, creating over 20 tons of force
- Testing standards: Every rim undergoes tire pressure testing up to 150 PSI
- Production capacity: Wheel builders produce 15-16 sets (30 wheels) per day
- Quality control: Each rim has unique serial number tracking throughout production
- Drilling process: Computer-controlled angled drilling specific to each rim model
Interview Summary
Interviews with Light Bicycle employees including Charlie (production supervisor), Dora (product manager), Dapia (designer), and various production workers. Key insights: Dora discussed product development including competitor research, impact stress testing, and lateral stiffness testing for the Helios rim. Charlie explained the manufacturing process and quality control. Workers emphasized the importance of practice and experience in carbon fiber layup.
Brand Highlights
- +Vertical integration as both brand and factory
- +Open office layout with team roughly 80% women
- +Free communal lunches and long midday breaks
- +All carbon layup and finishing done by hand
- +Unique three-piece mold system for rim bead hooks
- +Company culture focused on employee well-being
- +Direct-to-consumer model allowing for competitive pricing
Products Mentioned
Latest rim model mentioned by product manager Dora, developed through competitor research and extensive testing
Wheel model shown laced to Numplas Co brand hubs with wide rim bed
Best-selling model with multiple molds for single model production
Wheel model shown with i9 hubs