Slipping shimmed post

[cyberknight]

The seatpost on my giant retro mod keeps slipping
It has a factory fitted shim and no matter how tight i do the clamp up it slips , i did grease the post when i installed the new one that i made sure was the correct size as the original was single bolt that i can never get level .The seat can be nudged sideways too easily enough.
Take the grease off? carbon paste ? replace the seatpost clamp ? ( the last would be a shame as its the original once branded one )

 

[Slick]

The seatpost on my giant retro mod keeps slipping
It has a factory fitted shim and no matter how tight i do the clamp up it slips , i did grease the post when i installed the new one that i made sure was the correct size as the original was single bolt that i can never get level .The seat can be nudged sideways too easily enough.
Take the grease off? carbon paste ? replace the seatpost clamp ? ( the last would be a shame as its the original once branded one )

From my limited experience, replacing the clamp is the only real solution.

I wouldn't take the grease off especially at this time of year, so it only really leaves your least favourite option.

Not sure about the relevance of cherry coke, but I'm sure someone will explain how thick I am.

 

[Paulus]

From my limited experience, replacing the clamp is the only real solution.

I wouldn't take the grease off especially at this time of year, so it only really leaves your least favourite option.

Not sure about the relevance of cherry coke, but I'm sure someone will explain how thick I am.

Make a shim out of the can?

 

[Cycleops]

Seems a bit of a bodge. I wonder if it has to be cherry flavour?
Certainly better than drinking the revolting stuff.

 

[13 rider]

Carbon post ? , I would try a gripper paste

 

[cyberknight]

Carbon post ? , I would try a gripper paste

nope , alloy on alloy
I do have another post from @vickster which im going to try and i might have another clamp that will fit

 

[cyberknight]

Changed posts and clamp, the old clamp looks like its had the threads stripped at some point .
interestingly looks like its a 31.6 seat tube shimmed down to 27.2 , luckily i had both sizes of clamp in spares .

 

[Kingfisher101]

Carbon paste and a new seat clamp, I've had this with my MTB and it drove me nuts. I've found carbon paste the best thing and the Halfords brand at £3.00 is very good. However that's not the end of the story because then the seat post can creak which is a pain as well.
Don't do like I did and really overtighten a seat clamp, the bolt broke and then the seat fell down and I had the ride the bike home standing up. It was all uphill as well in the boiling hot weather.

 

[biggs682]

Seems a bit of a bodge. I wonder if it has to be cherry flavour?

No any flavour works going on my experience

 

[albion]

Cling film, or if enough space, thicker plastic from food wrap.

 

[All uphill]

I used emery paper as a shim. It worked.

 

[Cycleops]

Let's face it most anything you stuff in will work but maybe the OP is reluctant to use a bodge?

 

[Paulus]

How about buying a seat post of the correct size?
Radical thought.

 

[Ian H]

Seems a bit of a bodge. I wonder if it has to be cherry flavour?
Certainly better than drinking the revolting stuff.

You've not read Robert Pirsig's book then.

 

[ColinJ]

You've not read Robert Pirsig's book then.

I read it...

Not that that helps because my ageing memory hasn't retained enough of it to understand the reference!