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  • Very little wiggle room there, assuming a 110mm PCD chainring you can't go below 34T, and Campag don't really do big sprockets, in 9-speed you're probably looking at the 13-28 Veloce.

    Some major component changes are in order, if you want to keep the 9-speed Ergos then a long cage rear mech and a triple chainset plus matching front derailleur. Doesn't seem worth it when that still only drops you to a 30/28 gear, still less than 20% below the 34/26 you've already got.

  • Very little wiggle room there, assuming a 110mm PCD chainring you can't go below 34t.

    You can go below that with a 33T TA chainring.

  • On selected cranks, with a bit of filing. Bear in mind that Campag compacts have the 5th bolt at 112mm, ruling out any possibility of squeezing one more tooth out of the inner ring.

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