My wife's shiny red Brompton arrived today. The bike rides beautifully. It is in very clean condition, with a nice clickety-clickety Sachs 3-speed hub offering a fairly wide gear range.

There's no minimum insertion point marked on the (31.8mm Ø) seat-post, which is about 50cm long (not counting the narrow section at the seat end) and there's about 9cm of post inside the seat-tube when the post is lifted out to its maximum extension and the flared end catches. Will that insertion depth do?

Regards
T