Saddle Adjustment Problem

[BrynCP]

I adjusted my saddle downwards by simply:

1. Loosening the bolt (it's a single one)
2. Adjusting it to what I wanted
3. Tightening it
4. Checking it

I then rode it, and as all the theory suggests, it was unsuitable as it was hurting my hands.

So I decided to adjust it back up, doing exactly as above. However, after 4 miles today the saddle basically tilted up by quite a bit while riding and locked there! Luckily I go so slow it didn't matter and I had my multi tool and repeated the above on the pavement. Should I be doing something else as well? It was very tight, I couldn't put any more force on the bolt, so I am not sure why the sudden rapid tilt?

I am nervous now it will do the same at some other random time!

 

[compo]

Do you mean you lowered the saddle or that you adjusted the amount the saddle tilts. Either way you may find that what you call tight with a little multitool isn't in fact very tight. Try tightening the bolt with a proper allen key but just don't go too mad at it.

 

[BrynCP]

Do you mean you lowered the saddle or that you adjusted the amount the saddle tilts. Either way you may find that what you call tight with a little multitool isn't in fact very tight. Try tightening the bolt with a proper allen key but just don't go too mad at it.

Sorry, adjusted tilt.

 

[musa]

Level saddle, decrease the height

 

[TissoT]

The tilt action is on a ratchet system ... you need to make sure the teeth are gripping each other then tighten up the bolt

 

[raindog]

I had the same problem on one of my seat posts - adjusting bolt always coming loose. I wrapped two or three turns of that white plumber's tape - sorry, don't know technical name - round the bolt threads, and it's never moved since. You could try that.

 

[compo]

I had the same problem on one of my seat posts - adjusting bolt always coming loose. I wrapped two or three turns of that white plumber's tape - sorry, don't know technical name - round the bolt threads, and it's never moved since. You could try that.

polytetrafluoroethylene

 

[Chris-H]

polytetrafluoroethylene

Also know as ptfe tape

 

[raindog]

cheers guys

 

[compo]

Also know as ptfe tape

Far too easy

 

[robjh]

Got a problem with a slipping seatpost, that has got a lot worse lately. I have replaced the bolt on the seatpost clamp in case it was that, got a longer allen key to apply more pressure in tightening, but all to no avail.

Is ptfe tape likely to be useful here? Not quite the same case as the OP I know but it's in the same area. Any other ideas?

 

[Enigma2008]

If the seat post clamp isn't gripping the seatpost it suggests that it's the wrong size clamp or seat post.

 

[ufkacbln]

If the seat post clamp isn't gripping the seatpost it suggests that it's the wrong size clamp or seat post.

.. and you will (if as likely this is the case) be putting additional stress on the retaining bosses on the top of the tube and they can break off.

Even collars are prone to failure in these circumstances