Seatpost slipping down no matter what

[bikeworkshop]

Have it welded in place

Glue is cheaper.

 

[PanoIgano]

Are you 100% sure the seat post is the correct size?
It looks to be a Fat Chance yo eddy?
These use a specific size post, quite hard to find, 29.4 from memory.

It's a FAT TUBE seat post and the one that came with the bike when it was sold in 1991. In fact, it's a very interesting seat post in that its interior is not hollow but has a cross that goes throughout its length to reinforce it. I am not describing it too well. Will take a picture and you will get the idea.

Anyhow, the issue now that I removed the QR and replaced it with an allen screw seems to have been gone! Will see how it goes in bigger rides.

 

[1552]

Ah ok, well there is a good chance if it's the original quick release after all these years the cam action (egg shape) on the qr has worn so essentially it's just closing, not actually applying extra pressure as you push it closed, if that makes sense

 

[Elev12k]

I have 3 bikes with 29,4mm post: Yo, Verlicchi DH and Batavus. Today took delivery of two Kalloy SP 248 in silver and black for the Batavus. I do like the SP 248. It is period correct, 400mm long, but probably not fancy enough for a Yo.