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Out of curiosity, what would cause it to walk up?
It squishes the top of the seattube so that's a smaller diameter and the clamp will slide up towards that smaller diameter.
Tester will put it in more technical language.
M_V-
Oh I see, so it's about uneven force applied to the clamping area, with more pressure applied to the top of the clamping area. Is this still the case if the top of the clamping area sits above the bolt on the seatpost collar?
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Tester will put it in more technical language.
Not sure about that, but the principle is the same as stem clamps on steerers and I've explained that in non technical language more than once on here.
miloas
gbj_tester
Interesting. Out of curiosity, what would cause it to walk up? It not being seated properly? There's no upward pressure on the clamp so I'm struggling to understand the mechanics at play. In any case, it sounds like I can keep an eye on it for now - I'll scour the internet for a chrome clamp of the correct height/fastening mechanism.
@Kimmo I'm not sure to be honest. The Barachhi frameset has a designated portion of the seat-tube that's good for clamping, ie. it's of a narrower diameter and is raw carbon, rather than painted. I think this is my fuck-up, not Tune's - I should've got the right height collar. Not sure I quite follow with the dremel instructions though, do you mean dremel the bottom of the clamp to make sure it sits flush (ish)?