Just spent over an hour reading about this. Only found what doesn't work. Have not found what does work.
I have the crank pictured bottom center:
https://www.quarq.com/...ero-for-specialized/
Mine is a 52/36 110 BCD, from 2012.
Quarq Dzero for Spesh does not fit as per that document.
Would a regular Dzero 5 bolt 110 BCD work? Like this one: https://www.amazon.com/...3&keywords=quarq
A slowtwitcher already confirmed that a Powertap C1 does not fit. Not sure why. Bummer because they are on sale for $350.
SRM appears to also fit 2013 and up Spesh carbon cranks, which then implies (but not sure) that it won't fit a 2012. However. As much as I like Ze German engineering not sure it is worth $1400. Other two choices are less than half that price.
I have the crank pictured bottom center:
https://www.quarq.com/...ero-for-specialized/
Mine is a 52/36 110 BCD, from 2012.
Quarq Dzero for Spesh does not fit as per that document.
Would a regular Dzero 5 bolt 110 BCD work? Like this one: https://www.amazon.com/...3&keywords=quarq
A slowtwitcher already confirmed that a Powertap C1 does not fit. Not sure why. Bummer because they are on sale for $350.
SRM appears to also fit 2013 and up Spesh carbon cranks, which then implies (but not sure) that it won't fit a 2012. However. As much as I like Ze German engineering not sure it is worth $1400. Other two choices are less than half that price.