T Line - Brompton Custom Shop - Base Model

Your Starting Point for a Fully Customized T Line

This is the factory Brompton T Line—the lightest, most refined platform Brompton has ever built, and the ultimate foundation for a truly custom ultralight build. With its titanium frame, carbon components, and three different gearing options, the T Line is designed for riders who prioritize effortless portability, fast folding, and a crisp, responsive feel on every city ride.

In the Custom Shop, this base model becomes your ultralight blank canvas. You can change the frame colors, drivetrain, cockpit, lighting, tires, suspension, finishing hardware, and more. Keep it simple and minimalist, fine-tune performance, or create a distinctive, premium build. Every component is installed and tuned by our Brompton specialists.

Use this Base Model to explore the full range of customization options and create the T Line that matches your commute, your carrying needs, and your personal style.

Start with the essentials. Build the Brompton that’s uniquely yours.