Slipping Seatpost

[warpedboy2]

Hello again,

I bought a p7 off Ebay a few months ago, and have a problem with the seatpost always slipping down unless I tighten it up so much the QR bolt is actually bending :shock:

Its a 95 frame with a welded clamp, so unfortunatly its not a simple case of buying a replacement clamp.

Is there 'owt I can do?

Cheers.

 

[videojetman]

sounds like the seatpost is too small, try a larger diameter seatpost.

 

[warpedboy2]

It's the original orange post that came from the factory.

 

[NAILTRAIL96]

Has the post been polished, or the seat tube had the rust stripped out with a drill mounted brush etc.
This could remove enough metal to make it a little loose.
As said you could try another post or see if a "coke can" shim will fit.

 

[sylus]

another for the coke can route or should you wish a proper shim.

I remember my old c16-r had a shim in and yet was running the original seat post

 

[Anthony]

According to Orange, it should be a 30.0 post, but in later years they went over to using a 27.2 post with a shim - that could be one solution.

The other thing that strikes me is that you say you're using a quick-release clamp. I have always found them weak and I wouldn't give up on the post until I had tried a proper allen key clamp.

 

[CAS]

Try "gritty grease" not sure of the technical name. My LBS donated me a finger full for my slipping seat post and it's not been a problem since.

I think it's expensive to buy so touching up the LBS for a freebie might be worth a go.

 

[sunchaser]

Is it possible that the top of the seat tube has stretched?

 

[justbackdated]

I might have a 'finger full' of the Pace gritty grease you could try

 

[warpedboy2]

I might have a 'finger full' of the Pace gritty grease you could try

Yes please, you terrible flirt.

Thanks for your input fellas. On closer inspection it is the top of the tube that is stretched. I'm going to try a coke can insert (after pouring the coke down the toilet first).