The original Brompton folding bike is a design classic: same basic fold, same 16-inch wheels, largely the same geometry since Andrew Ritchie sketched it out in 1975. The P Line is what happens when you take that idea and remake it in titanium.
The frame uses a titanium rear triangle and fork paired with a steel mainframe, which brings the whole bike to approximately 9.65 kg — a meaningful reduction over the steel C Line, and light enough that carrying it up two flights of stairs or through a tube barrier stops being a negotiation. The fold is unchanged from the original: three articulations, 20 seconds, a package small enough to fit under a desk or in the overhead bin of a train.
Where the P Line earns its premium is in the riding quality. Titanium has a natural compliance that steel doesn’t: it absorbs road vibration rather than transmitting it directly to your hands and sit bones. On a 16-inch-wheeled bike that’s bouncing over London cobblestones or New York pothole craters, the difference is real. Pair that with Brompton’s own SRAM-sourced 4-speed derailleur, enough range for most cities without the complexity of the 12-speed option, and you have something that’s genuinely pleasant to ride rather than merely functional.
There are cheaper ways to fold a bike. There’s nothing that does it as well, as light, or as discreetly as this.
From £2,319 — brompton.com