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I need to replace some 11 speed ESP chainrings (not to be confused with EPS, their e-shifting tech). I am only finding 11 speed XPSS chainrings.

Campagnolo calls XPSS:

X.P.S.S.™ Extreme Performance Shifting System

There is very little info about ESP Actuation System on the internet (hard enough to force search engines to not return EPS results). All the XPSS info I can find refers to their newer 12 speed lineup.

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  • What did you ever find out. I need an xpss and can only find esp..
    – Jsees
    Commented Sep 23, 2023 at 0:28
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    @Jsees as long as you fit a matching pair (either ESP or XPSS) shifting will be correct.
    – Noise
    Commented Sep 23, 2023 at 15:24
  • Research shows XPSS is an optimized tooth profile on the chainrings they have introduced 2010 or 2011 and I would guess by the less dramatic nomenclature (and some older 11-speed cranks found in various online stores listing this "feature"), ESP was the predecessor. I'm no Campy expert but would guess as long as other factors (like BCD) are the same, you just get an upgraded shifting experience and XPSS ones are easier to get than the older ones...
    – DoNuT
    Commented Sep 23, 2023 at 15:52

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