Seatpost clamp

[dudleygb]

Hi guys,

Something weird is happening with my seatpost clamp. Been working fine, but suddenly its as if, its just losing its 'clampiness' or something. As I ride, the thing just keeps sinking into the frame. I've tightened this thing with all the force I can muster but it refuses to hold. Can someone please recommend me a good seatpost clamp. Its such a small and annoying yet critical item. Thanks in advance.

[KGB]

What frame, clamp and post? What grease, if any, are you using?

Sometimes this can be solved with some carbon assembly paste, other times you'll need a special double clamp that camps onto the frame and the post to really lock it in place.

[gabrielle260]

May I ask what you weigh?
I am around 100kg and after 7 years the aluminium Ritchey seat post compressed a tiny bit where it was clamped and therefore wouldn't stay at the same height. I replaced both the clamp and the post and all is now fine.
The moral of the story for me was that all parts of the bike wear out - it's just a case of time!
Andrew

[dudleygb]

thanx for the responses!

I see there was some or other grey grease on the post. Sorry, I should've mentioned I loaned my wifes bicycle clamp and that seems to be holding. Maybe I just had a crap clamp to start with. I got a Polygon frame from bicyclesonline.com.au and an entity seatpost.

I weigh around 95kg. Agreed, it could just have worn from my bulkness. Either way, I just want to get a better clamp. Really appreciate the tips and suggestions.

[open roader]

Sounds like the thread has been stripped on the end of the tensioning bolt, hence max. torque still not clamping the ring tight enough to hold......

[dudleygb]

I got some decent new clamps but still its not holding, looks like I will need a new seatpost. Can someone please recommend me one from here:--> http://www.cyclingdeal.com.au/shop/part ... west_price" onclick="window.open(this.href);return false;

I ride a MTB, adapted for commuting during the week and offroad on the weekend

[Derny Driver]

I got some decent new clamps but still its not holding, looks like I will need a new seatpost. Can someone please recommend me one from here:--> http://www.cyclingdeal.com.au/shop/part ... west_price" onclick="window.open(this.href);return false;

I ride a Polygon MTB...

Polygon MTB are 30.9 seatposts ???? I don't see any on the page you linked.

PS I had the same problem on my son's road bike. Swapped the worn carbon post for a new aluminium one, got a new clamp - problem solved

[dudleygb]

yeah you are right, thank you for that.

if anyone can recommend a replacement 30.9 MTB, I would be grateful. So far the only ones I've seen are crazy expensive.