You could try to add a thin layer of tape to "shim" up the size. Then liberally use the carbon paste.

File down the seat post clamp and then retighten it.

Lots of remedies such as:

• Use hairspray. This really does work.
• Use tape to beef up the seatpost size
• Cut an aluminum can and shimmy a piece down into the hole to wedge the gap
• Use more than 4nm

thanx for replies. st comes thru. little piece of duct tape did the trick. who new. went three weeks with this issue.

n = nano
N = Newton

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Don't forget to attack!

Contact cervelo for them to warranty your post. I had a problem with my p3 slipping, and it was the post itself not precisely to spec. New post, has never slipped.