So I've just replaced my telescopic seatpost to this alloy one that's a fraction of the weight (470g savings!). Yet to take it for a spin, but any major cons I need
Titanium Seatpost, Brompton Extended Length - Freedom Folding and Electric Bikes
Brompton C Line Explore - 6-Speed - High Bar - Extended Seatpost - 16" Folding Bike - 2022 - picadilly blue matt
Brompton Telescopic Seatpost Mod | selfaware soup
Brompton C Line 2 Speed S (Low) Handlebar, Matte Black - Extended Seatpost - NYC Velo
BROMPTON TELESCOPIC SEAT POST – O'Mara Cycles
Telescopic Seatpost for Brompton Bikes | Perennial Cycle
My Orange Brompton: Brompton Aluminium Telescopic Seat Pillar
Brompton seatpost | BLACK steel extended length
Brompton Telescopic Seat Post / Seat Pin
Brompton Telescopic Seatpost Mod | selfaware soup
Telescopic Seatpost Snap-Fit in Silver | Brompton Bicycle USA