I wasn’t sure whether to post this here, or with the mechanics. Hoping for some creative solution help!
I need to add 5 inches to a seatpost.

This is for a folding bike. I have a telescoping seatpost and it it’s fine height wise. The problem is, the lower section is not long enough to push through the bottom of the frame and act as a support.

The pics below tell the story. Stock post is too short, but the 580mm 34.9 dis post is the right length to act as a support when folded.

the new telescoping post gives me the height I need when riding, but the lower 33.9 dia portion is about 5 inches too short to function as the bike support.

Any suggestions as what I could use to scab on another 5” of non structural post? Wedge a 3/4” piece of alum tubing in the rubber plug? Find someone to weld on a section of tube and the grind it smooth? Other? Thanks for any suggestions!!!



This is the lower section of the new telescoping tube that I need to add 5” to

This is how it should sit. This is with the stock post (but this post doesn’t extend high enough for me, thus the issue)

This is my new post. The rubber plug at the base has a 3/4” aperture and extends about an inch or so into the tube.