power2max makes wonderful power meters. We use them on a number of our own bikes here. They measure power from both legs, are super reliable, accurate and are reasonably priced. However, not all Praxis cranksets can fit a power2max. (All current versions will work with a power2max, but some of the older versions will not.)
Specifically, if your Praxis crankset uses the 3-bolt direct mount interface, then a power2max NGeco Praxis Road Power Meter will work. Direct mount cranksets (left image) have drive-side crank arms that can be removed from the crankset. They can also be identified by 3 bolts located on the inside of the spider which are used to secure the right-side arm to the spider to the crank arm. All current version Praxis cranksets are direct mount. This includes both the ALBA and Zayante road and gravel cranksets.
Two more notes…
1. Some Praxis cranks ship with Praxis Works LevaTime chainrings. These chainrings do not fit the power2max. We recommend Praxis Works Buzz Road Chainrings which use a BCD that fits the power2max.
2. Please also note the smallest inner ring that will fit on this power meter is a 34T. It is not compatible with Praxis 48/32 chain rings.
Upgrade to Praxis Direct Mount
If your Praxis crankset is not direct mount, you can upgrade your crankset to a direct mount version. We carry the full line of Praxis cranksets. Some of these cranksets, such as the Zayante, allow you to order just the crank arms which is perfect as the chainrings that come with these cranksets won’t fit the power2max. You would then order Praxis Works Buzz Road Chainrings and would have everything you need.
Other Praxis Power Meter Options
If your Praxis crankset is not direct mount are not interested in upgrading it, we would refer to you this article for other power meter options: What power meter will work on a Praxis road crankset?