Seatpost reduction, 0.2mm

Mike Muz · Mar 5, 2017

Has anyone done this?

I have a nice seatpost, 27.2, that I want to put in a frame with a 27.0 seat tube. Being black, I only want to take it down on the section that will be in the frame.
Can anyone offer sensible advice on this issue please?

Thanks a lot

Mike

Antstark · Mar 5, 2017

Re:

Yes..don't you nutter! You'll die

Get the right size post

paddlingpool · Mar 5, 2017

^^ What he said. Don't ruin your nice post. Buy another.

02gf74 · Mar 5, 2017

This is one of those situations that seems alright on paper but very few people have tried this so there is little data as to what happens in the real world. Will it be ok or will the step where the post changes diameter be a source of stress fracture leading to the post snapping, who knows?

How to you plan to fit it in a lathe chuck if the seat clamp cannot be removed?

Why can't you fit a negative shim?

kingbling · Mar 5, 2017

Ah so the Roberts is 27mm it will look pants mate as the top of the seat tube is curved and any machining on the seat post will have a straight edge you would have to colour it in to stop the silver bits showing.

I don't think any shim will make a small hole bigger BTW

The History Man · Mar 5, 2017

And for the effort involved, and the anxiety - will I die etc - just get the right size by trying a few old ones first.

Mike Muz · Mar 5, 2017

Re:

May have to use the Kalloy one instead then :roll:

Mike Muz · Mar 5, 2017

Re: Re:

Mike Muz 67":2bsxc9g7 said:
May have to use the Kalloy one instead then :roll:

Or put an ad up.

Thanks for your thoughts

Mike

mdvineng · Mar 5, 2017

Removing 100 microns from the wall thickness isn't going give you a structural failure.

Mike Muz · Mar 5, 2017

Re:

How would you ensure it is round when removing the 0.1 all way around the post?

Mike

Seatpost reduction, 0.2mm

Mike Muz

Antstark

paddlingpool

02gf74

Old School Grand Master

kingbling

The History Man

Mike Muz

Mike Muz

mdvineng

Senior Retro Guru

Mike Muz

Similar threads

Latest posts