These Gearbox Folding Bikes Will Blow Your Mind (Custom Bromptons!)

Summary

The main theme is the evolution of Brompton folding bikes through aftermarket upgrades. Key subjects discussed include larger wheel diameters, wider tires, and advanced gearboxes and belt drivetrains. The takeaway is that these modifications allow for increased versatility, improved performance across various terrains, and may influence future Brompton designs.