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@ewanmac
I built this up a few weeks ago, and despite being fine for a few 60km rides, the seatpost begun slipping on this weekend's group ride. This is apparently a known problem with Soloists (S1) as the shape of the aluminium seat tube is a poor fit with the carbon seatpost. This led to many people over tightening the seat clamp and lots of cracked frames. Cervelo attempted to fix the problem by providing a brass shim fill the gap, and later editions of the frame shipped with the shim included.
My frame came with one of these shims (pictured below), and despite torquing everything correctly, and despite liberal amounts of grip paste, my seatpost still slipped, taking the shim with it into the depths of the frame, where I needed a long screwdriver to prise it out again.
As you can see the shim has a rolled top to stop it sliding down inside the seatpost, but clearly this wasn't sufficient to hold it in place. I would like to stop my seatpost slipping, and stop my shim disappearing, and I would like to avoid cracking my frame, does anyone have any suggestions? Add more coke can shims? or maybe try gluing the shim in place inside the seat tube?
Photo 1: Seatpost fitted without shim
Photo 2: Shim
Photo 3: Seatpost fitted with shim
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