The stock seatpost works. But it's heavy, it rusts, and it's not exactly exciting. This titanium seatpost is a direct replacement — same fit, same function, but made from grade 9 titanium alloy. It's lighter, stronger, and won't corrode. And unlike most titanium upgrades, it comes in five finishes including rainbow and gold, so it can be as subtle or as eye-catching as you like. How it works Direct swap for your stock Brompton seatpost. Remove the old one, slide this in, set your saddle height, tighten the clamp. The diameter is 31.8mm — the standard size for Brompton. Three lengths available to suit different rider heights: 535mm, 550mm, and 580mm. Key features Grade 9 titanium alloy — stronger than steel, lighter than aluminium, and completely corrosion-resistant Five finishes — natural, matte black, sandblasting grey, gold, and rainbow. All applied using anodising or surface treatment, not paint Three lengths — 535mm, 550mm, and 580mm to suit your saddle height preference 31.8mm diameter — direct fit for all standard Brompton models Lightweight — noticeably lighter than the stock steel post Which length do I need? Most riders use 550mm or 580mm. If you're taller or ride with your saddle high, go for 580mm. If you're unsure, send us a message with your height and we'll help you pick the right one. Got a question? Not sure which length or finish suits you? Send us a message — we're happy to help. Specs Material Grade 9 titanium alloy Diameter 31.8 mm Lengths 535 mm, 550 mm, 580 mm Finishes Natural, Matte Black, Sandblasting Grey, Gold, Rainbow Compatibility Brompton A Line, C Line, P Line, T Line
