OGs know that the old bromptons came with a similar style seatpost bung which was better since it would never come out. But I think I weighed it before and it was like 40g.
I finally decided to design and 3D print my own and wanted it to get close to the same weight as the new standard one. It’s just .6g heavier but I could probably optimize it a bit more haha
It uses a titanium bolt to pull the spreader cone thing to expand the prongs so it won’t just come off like the current one which is only (loosely) friction fit.
I still need to take it out on a ride but it feels way more secure, can’t pull it off even if I tried. So I would be way more confident keeping some tools or supplies like pump/tubes/zip ties in there than just the normal bung.
Also another pro is that this allows third party posts without a flared base to get that functionality back; mainly the preset height sleeve.
by edtse88
2 Comments
Nice work! 👍 Would you share the STL for this?
I don’t wear a butt plug when cycling, as I have the basic super light seat and it would put too much pressure on the butt plug I would think … Do you have a split seat in order to wear yours? 😂
[https://www.ebay.com/itm/286667857053](https://www.ebay.com/itm/286667857053)