Clamping Carbon Frame/Components in Workstand
 

For those of you with carbon frames and carbon seatposts. how do you clamp the bike into a workstand for service without fear of damage.

I thought of swapping the seatpost with an alloy part just for services but that's pretty tedious when all that's needed is a quick adjustment.

Any input would be appreciated.


-Tim-

I'm not sure there is an elegant (i.e., quick) solution.

Park has the internal seat tube clamp ISC4.

You can get one of the team race-style workstands (Park PRS20) that support the BB shell and require removal of the front wheel. But it probably takes as much time to remove the front wheel as it would to use the internal seat tube clamp or a cheap alloy post.

Either use a metal seat post for clamping the bike in a stand, or an internal expanding clamp, such as the Park ISC-4 mentioned above.

+1 on the cheap metal seatpost but, unless you have got to clamp the bike really tight for heavy work, the carbon seatpost should take moderate clamping forces without damage.

I googled the Park ISC-4 tool and came up with this...
At first I was like, OK, great, a neat tool to play with. Awesome! Then I saw that thread and laughed so hard with the "Calm down and take a breath" comment. Doh!

I might try that tool. But then again...


-Tim-

Seatposts are much thicker than carbon frame tubes. Yeah, I'd probably think twice before applying a lot of torque on a bottom bracket, but for typical brake or drivetrain adjustments, I would just clamp the seatpost.

I'd never clamp a modern bike's frame, the frames are usually very thin walled, either aluminum or carbon.

Some of the bike stand's lever type clamps can apply a lot of force if mis-adjusted, so be a little careful if you have that type.

My CF Giant has a "D" shaped seat post !! so I suspend the bike by the saddle then use elastic hooks from the rims to the stand feet to stop it moving about, after all one is not putting extreme force on the bike only general cleaning adjustments etc, OK if you taking wheels out hook on to something else.

Just clamp on the seatpost. Seatposts are designed to take compression loads, and a light carbon bike doesn't take much to hold it.

The absolute worst case is that you crack the seatpost and have to buy another.

Another thought. Even with a dedicated metal seatpost or while working on bikes where it is safe to clamp the frame tubing (Ti or Steel), I always put the bike back on the floor on it's wheel to do really high torque work such as bottom bracket cup removal or installation.

+1 on the encouragement above to buy a $10 metal seatpost. It's a no brainer. It's a 60 second process and takes away all the worry of working with carbon.

On the Trek Domane bikes, there is a CF seattube that surrounds a round post that is integral to the frame. I've clamped on top of this (gently) and it worked for me. I used a Park clamp - one of the old, very beefy metal clamps that can be adjusted very nicely.

The LBS guy looks at me in horror when I say this. I believe that they remove the seattube and clamp directly to post. That's probably better.