• I think this crack was unique to my particular model year. It’s at the cut out on the seat tube that the seat collar pinches together when tightened.
    Apparently the seat posts were prone to slipping and the crack would appear due to folk over tightening the bolt.
    Cervelo sent out a brass shim to stop the seat post slipping which apparently solved it.
    I don’t have wheels for the bike yet, so I’ve yet to find out if it’s going to slip.
    My fault for not doing my homework before a very impulse buy!

    It’s very small, so I’m hopeful that it won’t get worse.
    If it does, I think I’ll look for a newer S1 like yours or maybe an S2

  • Thanks, that’s a great suggestion. Hadn’t considered anything like that.

    What size diameter drill bit would be best? How far along from the crack?
    Is the idea that if the crack does get worse, it propagates towards the hole then hopefully stops there?

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