Skip to product information
  • Gold Brompton seatpost 31.8mm x 580mm with mounting hardware, aftermarket accessory for Brompton bikes
  • Brompton front frame tubes in black, silver, gold, red with matching hardware for custom bike builds
  • Brompton front frame in black, silver, gold, red with matching hardware配件
  • Brompton Litepro front frame in black, white, gold, red for custom bike upgrade
  • Brompton front frame tubes in red, gold, silver, black for custom bike builds
  • Red Brompton front frame tube with hexagonal interior, gold and black variants shown
  • Brompton Mini Insert front frame tubes in black, gold, white, red for folding bike customization
  • Brompton Mini Inset frame tubes in black, white, gold, red for custom folding bike builds
  • Brompton front frame tubes in gold, black, red, silver for custom bike builds
  • Red Brompton seatpost 31.8mm x 580mm with hardware, aftermarket accessory for Brompton bikes
  • Brompton Litepro black seatpost 31.8mm x 580mm with hardware, aftermarket bike accessory
  • Colorful Brompton front frame tube 31.8mm x 580mm with mounting hardware
  • Brompton Mini Insert in black, white, gold, red — lightweight bike frame accessory for folding bikes
  • Red Brompton front frame tube with hex socket, shown with gold and black variants for custom bike builds
  • Brompton A61 handlebar stem in black, silver, gold, red for folding bike customization
  • Brompton Mini Insert frame tubes in black, white, gold, red for folding bike customization
  • Gold Brompton front frame tube, high-strength aluminum alloy, lightweight 336g upgrade part
  • Silver Brompton front frame tube 31.8mm x 580mm with mounting hardware
  • Brompton front frame in gold, black, red, and silver for custom bike setup
  • Brompton front frame tubes in black, silver, gold, red with matching hardware for custom bike builds
  • Brompton MIN INSERT seatpost in black, gold, white, red for folding bikes
  • Gold Brompton seatpost 31.8mm x 580mm with mounting hardware, aftermarket accessory for Brompton bikes
  • Brompton front frame tubes in black, silver, gold, red with matching hardware for custom bike builds
  • Brompton front frame in black, silver, gold, red with matching hardware配件
  • Brompton Litepro front frame in black, white, gold, red for custom bike upgrade
  • Brompton front frame tubes in red, gold, silver, black for custom bike builds
  • Red Brompton front frame tube with hexagonal interior, gold and black variants shown
  • Brompton Mini Insert front frame tubes in black, gold, white, red for folding bike customization
  • Brompton Mini Inset frame tubes in black, white, gold, red for custom folding bike builds
  • Brompton front frame tubes in gold, black, red, silver for custom bike builds
  • Red Brompton seatpost 31.8mm x 580mm with hardware, aftermarket accessory for Brompton bikes
  • Brompton Litepro black seatpost 31.8mm x 580mm with hardware, aftermarket bike accessory
  • Colorful Brompton front frame tube 31.8mm x 580mm with mounting hardware
  • Brompton Mini Insert in black, white, gold, red — lightweight bike frame accessory for folding bikes
  • Red Brompton front frame tube with hex socket, shown with gold and black variants for custom bike builds
  • Brompton A61 handlebar stem in black, silver, gold, red for folding bike customization
  • Brompton Mini Insert frame tubes in black, white, gold, red for folding bike customization
  • Gold Brompton front frame tube, high-strength aluminum alloy, lightweight 336g upgrade part
  • Silver Brompton front frame tube 31.8mm x 580mm with mounting hardware
  • Brompton front frame in gold, black, red, and silver for custom bike setup
  • Brompton front frame tubes in black, silver, gold, red with matching hardware for custom bike builds
  • Brompton MIN INSERT seatpost in black, gold, white, red for folding bikes
← Previous productNext product →

Brompton Aluminum Alloy Seat Post

Compatible with: A-Line, C-Line, P-Line, and T-Line
€43,99
€43,99 €0,00
. Free worldwide shipping · 2-Year Warranty · Easy Returns
Color

Brompton 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. Choose from five stunning colors - black, gold, silver, red and colorful - to match your style and make a statement on the road.

Designed specifically for Brompton bikes, this seatpost is the perfect combination of durability, style, and function.

Why order from Bromptonic?

  • ✅ Tested for Brompton compatibility
  • ✅ Free worldwide delivery — duties included
  • ✅ Two-year warranty and easy returns

Shipping and returns details

Product facts

Fits line
A-Line • C-Line • P-Line • T-Line
Weight-saving upgrade
Yes
Material
Aluminium