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Just don’t really want to be driving a pretty nice hollow carbon crank arm into an aluminium chainstay on every rotation given 100rpm....
I noticed the problem when I set up the Ultegra cranks on this initially, but the q-factor on Ultegra 6800 seemed a lot wider, and I managed to space the spindle to give about 7/8mm which I was comfortable didn’t catch the chain stay.
If I don’t space the B.B. there is literally a mm, which means under pressure the drive into the crank arm is going to be significant.
I spaced it to get about 3/4mm but the side-load on the bearings was so much that the crankset then didn’t freely spin.
I’ve bought a rotor 3D+ crankset as they have a very wide Q-Factor and the spindle can be spaced a lot given they’re for ‘all B.B. standards’.
Wait and see, with fingers crossed, that that solves the problem and I can’t soace it to give a nice even 10mm ish each side.
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Dick
I wouldn't worry about the stay clearance I've got about a mm, nothing had has happened... Yet.