I am finally putting my vb-218 build together  and besides having to redo the front hanger because of bad rivets and no epoxy....(I swear this is the most pain in the butt build...)

Any way I was testing out seat height.. well its slipped down a 1cm and is now stuck...  to be honest It was mostly in there already because of my short legs. and long torso and xl frame(only way I can fit bikes) biggest reach/ top tube for long torso and arms and a slammed seat post for my short legs... now its too slammed!

Any ways How do I get it out??? I tried a soft rubber mallet and pulling and twisting... its just slightly moving forward and back like 0.5 to 1 mm..

what other tricks can I try?

spray some isopropil alcool that is very volatile and does not affect the material but may make smoother the extraction
Look if the liquid penetrate up to the bottom bracket

I suppose there is some reduction of diameter in the molding.
Hammer two times up, and one time down in order to avoid dragging of chips

Lube it. Wd40 or anything else that penetrates.
Put an old saddle on that seatpost. Turn the whole thing upside down and step on that saddle. Now pull on that frame like a motherf#%$er!

If that doesn't help, I dunno what will. Maybe some more lube.

Is the seatpost clamping wedge still in place?  Also, looking on VB's website for this frame, looks like there's a removable panel by the bottom bracket. You might have a straight shot from that opening into the seat tube-if you do, you could use a piece of 1/2" diameter PVC pipe that fits inside the seatpost and hammer it out from the bottom.

Now wedge in place its just carbon on carbon

Are you sure the seat post clamp/wedge isn't fully unscrewed? I would just keep doing small taps with a rubber mallet until it comes out.

Quote from: jonathanf2 on February 04, 2025, 12:56:18 PM
Are you sure the seat post clamp/wedge isn't fully unscrewed? I would just keep doing small taps with a rubber mallet until it comes out.

its removed... just carbon on carbon