XO1. 94mm BCD.
ok I see what your talking about. in most places (america) I would guess that a 32 or even 34 tooth ring is common. that eats up some the clearance your thinking of. even on the surface you have to run a short cage front derailleur or you get tire rub in the granny. from what I hear. I have never put a front derailleur on my HT.
Just a speculative fiction. No cause for alarm.