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I have no idea, that's why I asked. They appear to be a completely different cleat so there's every possibility stack height may have been altered.


Better comparison

https://www.remo-knops.com/7310/how-to-install-speedplay-walkable-cleats/
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The stack height is determined by the height of the black 3-4hole adapter/shim thing.
If they changed the height of the yellow part or the c-spring it wouldn't engage properly. The height of the retaining metal piece is lower - but that has no effect on the stack height.Holding my v2 3-4 hole adapter up to aero one they appear to be the same height.
hippy
danb
Why sure there be? Basically they just slightly modified the metal top bit and added a plastic walkable top. The retention mechanism is unchanged-- like adding a Keep on Kover to a V2 (which differed from the v1 only, I think, in the adapter plate for 3 hole shoes).