[elhudy]

I don't buy the article's "study" whatsoever. From the pictures, they are testing the "flavor" using a drip method and don't control for the temperature. Using a drip method the ground should be fine. Fine is fine. .05mm coffee grains should mechanistically speaking soak through just as well as .08mm coffee grains.

It also strikes me as odd that each of the grinders was exactly consistent across an entire week for its flavor profile, and that further the exact consistency matches the cost(margin) of the grinders, and that even further the company who is doing this "study" happens to also be selling the grinders!

[falcolas]

Low quality grinders will result in unequal sized grains of coffee. Given that the flavor of coffee is largely based on the degree of extraction, having an even sized grounds will improve the consistency of the produced coffee.

[elhudy]

My point is that once you get to a fine enough granularity of coffee (as required per drip makers), you are likely getting the full extraction regardless at which point the quality of your grinder is moot.

Further, I have a hard time believing that inconsistent extractions is consistent with "better" flavor. It seems to me that the flavor would just be "different".

[sys-error]

quality filters will work with unequal size grounds.

example: a chemex with a barrista warrior filter will work amazingly well with medium to coarse grinds - just as well with medium or coarse only.

however, if you still subscribe to 'it must be the same size grind' - grind it twice at the same setting, then use a Kruve filter. I like using a 1100 and 400 size filters in my kruve, to give me the three types of grind i prefer (under 400 for my espresso, between 1100 and 400 for drip, and above 1100 for pourover. - all with the same bean!