Chen's Brompnot

A trifold bike for city life, and an ongoing record of building it.

From choosing a frame and tracking down parts to assembly, adjustments, and everyday rides, this is how the bike is becoming my own.

• Build notes — Why I’m building a Brompton-inspired bike, and the choices and compromises along the way.
• Parts — Models, specifications, purchase prices, and notes.
• Photos — The complete bike and the work that goes into it.