Slipping Saddle Post on My 2021 Giant TCR Advance 1 Disc.

[ianbarton]

I bought this bike a few months ago, but have only recently started using it now the weather is decent. Twice the saddle post has slipped right down when I have gone over some bumpy road. The first time I was 20k from home without a suitable tool to adjust the saddle, so had a very uncomfortable ride back home! Today I took along my torque wrench, so could fix the problem. I have torqued up the fallen nut to the maximum torque printed on the frame. I have checked for any greasy parts on the saddle post. Any suggestions on why the saddle slips? I don't want to have to carry my torque wrench all the time!

 

[derrick]

I bought this bike a few months ago, but have only recently started using it now the weather is decent. Twice the saddle post has slipped right down when I have gone over some bumpy road. The first time I was 20k from home without a suitable tool to adjust the saddle, so had a very uncomfortable ride back home! Today I took along my torque wrench, so could fix the problem. I have torqued up the fallen nut to the maximum torque printed on the frame. I have checked for any greasy parts on the saddle post. Any suggestions on why the saddle slips? I don't want to have to carry my torque wrench all the time!

If carbon it may need some paste.

 

[vickster]

try a new seat post collar? They do fail

 

[cougie uk]

Have you got any hair spray ? That's what I used on my TCR carbon post. Worked perfectly.

 

[Sittingduck]

Fiber grip if it's carbon post (pretty sure it is).

 

[fraz101]

My giant defy advanced was the same.
I bought some carbon paste from Halfords for £3.
Removed d fuse wedge and seat post and greased it.
Re torqued bolt and never moved since

 

[Smokin Joe]

Is it a round post or an aero one?

If round Probikekit used to sell a collar then clamped round the post and prevented it from slipping. If they are no longer available a suitably sized clamp or even a Jubilee clip would suffice.

 

[CanucksTraveller]

They're an aero post, you just need some carbon paste to sort this out. It's specified in the assembly manual, in fact Giant supply a sachet of it with all new bikes that have a carbon post. Assembling it "dry" is asking for slippage.

 

[ianbarton]

Thanks all. Although I live in a house with three females we don't have any hair spray

It looks as though I need some carbon paste. I'll go and buy a tube and hopefully it will work. It's the first bike I have had that has a carbon frame, so I need to do some reading up about carbon frames.

 

[vickster]

Thanks all. Although I live in a house with three females we don't have any hair spray

It looks as though I need some carbon paste. I'll go and buy a tube and hopefully it will work. It's the first bike I have had that has a carbon frame, so I need to do some reading up about carbon frames.

I'm sure your LBS would furnish you with a little bit of paste for a beer token, you don't need much

 

[ianbarton]

I'm sure your LBS would furnish you with a little bit of paste for a beer token, you don't need much

Unfortunately, my LBS closed a couple of months ago. It was a great shop and was very helpful. It would cost more in petrol to drive to the next nearest shop than to order a tube from Amazon. Of course, I could cycle to my nearest shop, but that would involve several very busy A roads.

 

[GuyBoden]

What's exactly is in carbon seatpost paste, it feels like ground glass in a bit of clear paste.