Brompton Aluminum Alloy Seat PostBrompton Aluminum Alloy Seat Post We are excited to introduce the Brompton Aluminum Alloy Seat Post, an incredible addition to your Brompton bike. Crafted from high strength thickened aluminum alloy, this seatpost is built to last. With a diameter of 31. 8mm and a length of 580mm (some batches are 600mm), it is the perfect size for a Brompton bike. Weighing in at about 400g (including accessories), this seatpost is lightweight and easy to install.

This component ensures the bike remains stable when folded

Brompton Large Capacity Handlebar Bag is specially made to fit the steering rack of your Brompton Bike

✅ Mounts on the standard Brompton front carrier block — choose the variant with carrier block included if you don't already have one

only at Bromptonic

no additional case required

Weight: about 925g

Sleek Color Options: Choose from an array of attractive colors including Black

Rain Cover Included – High-visibility rain cover stored discreetly in a dedicated pocket

ensuring a smooth riding experience

Product: Brompton Front Carrier Nikon/Canon Camera Bag

Protects the frame from rubbing by brake and gear cables

preventing any potential damage during transport or storage