Originally Posted by
smallwheeler
brompton seatpost is chrome plated cromo steel. you do not want to scratch or otherwise abrade the seatpost surface in any way; that will not help seatpost slippage. a thin layer of fresh grease creates a sealing effect between the tight tolerance of seatpost to frame tube.
also, the application of a thin coating of grease has the added benefit of preventing rust from forming.
if you have rust forming on any part of your bike, frankly, it means you are not taking care of it properly.
My ridgid bike feature well greased seatpost.
On a folder I know not to grease.
All the manuals for my folders state do not grease the seat post.
Rust has not a problem on my other old folding bike seatposts, funny that. So when it appears on the brommie seatpost I treat it. Its disappointing for a 6 month old part that's not had much use and been well looked after.
You may grease your seat post but the manufactors don't recomend it.