Mechanics and Fixing Any Questions Answered

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adamdenw in reply to @snottyotter

As best I can measure, about 27 with the tube walls at 1.4mm. That's odd isn't it? Though writing this makes me think @M_V 's point about external butting might be on the money - these numbers would add up then. If that's right, then I'd need a 30mm clamp and hope that works with a 27.2 post. Just a bit nervous as it's getting closed to the brazing.

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M_V in reply to @adamdenw

Zona ones are 1.2mm wall thickness at the top, paint could account for the extra 0.2mm.

You should be able to feel if not see the butting.

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adamdenw in reply to @M_V

The fillet brazing is super smooth - there's no obvious butting my inexperienced eyes/touch can tell. But I've just measured it below the top tube/seatstays and it's 28.6 so that would make sense then, I think i.e. 30mm above because of the butting and standard below? Thanks for this, very helpful.

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