My Brompton has a telescopic seatpost, but I have realised I don't really need that extra weight and complexity. So I am thinking on changing for an standard seatpost. Can I use a non-Brompton one? Or can I get rid of the telescopic extension and convert it into an standard seatpost? Any third-party options worth considering?
Thanks. Yes, it is not expensive at all. Right now is more a question of availability (I don't have Brompton suppliers nearby and I am flying with the bicycle in a few days), and of whether going down the Carbon Fibre route could be an option.
I am just the opposite from you. I have a regular standard seatpost. I was thinking of upgrading to a telescopic seatpost sometimes in the future with my present Brompton or a newer model. I would recommend to save the telescopic seatpost for a future sale and/or upgrade back to the original seatpost. As for purchasing a Brompton seatpost now and you are obviously in a hurry, why don't you just order one either on-line or over the phone from the dealer you bought the bike from or one of the dealers listed on the official Brompton website for your country. They usually offer the option of fast shipping the part to you via overnight delivery, 2 day delivery, or some other express shipping methods if the part is available usually for an additional fee.