Fellow Opus aeropress grind setting: the verified range

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Set a Fellow Opus between 2 and 8.75 for aeropress, per Honest Coffee Guide's compiled Fellow Opus chart. Start in the middle of the window and adjust on taste: finer if the cup tastes thin, sour or watery, coarser if the plunge is hard work and the cup tastes bitter or muddy.

Fellow Opus aeropress settings, and the bands either side

The neighbouring bands are there for context. If your aeropress sits at one end of its window and still tastes wrong, the answer is usually a different variable, not another step in the same direction, because past that edge you are grinding for a different brew method.

Why aeropress wants this part of the dial

The AeroPress band on any chart is wide because grind is only half the recipe: steep time is the other half. A fine grind with a short steep and a medium grind with a long steep land in a similar place, which is why the published window covers so much of the dial.

Dial it in from the chart in 3 steps

1. Set the middle of the aeropress window above and brew once, changing nothing else. 2. Taste against the two failure directions: finer if the cup tastes thin, sour or watery, coarser if the plunge is hard work and the cup tastes bitter or muddy. The full logic is in the AeroPress ratio and the inverted method. For the rest of the recipe, see the AeroPress buying guide. 3. Move in small steps and write each attempt down; the free dial-in logbook exists for exactly this. Pick a steep time first and hold it while you move the grind. Two variables at once and the wide window becomes a maze.

How the Fellow Opus adjustment reads

The Fellow Opus uses an outer ring numbered 1 at the fine end to 11 at the coarse end, plus an inner ring for finer steps. Find your zero before trusting any chart: with the hopper empty, close the burrs until they just touch, call that zero, and count from there. A zero point calibrated differently from the chart's shifts every range by the difference, which is behind most complaints that a chart is wrong. The full Fellow Opus grind settings chart has every other brew method on one page.

AeroPress on other popular grinders

Get the grinder

The Fellow Opus is on Amazon: check the current Fellow Opus price. We link the search rather than quote a price that will be stale by Friday.

Related reading

• Fellow Opus grind settings chart
• The aeropress ratio
• All gear guides

FAQ

What grind setting is aeropress on the Fellow Opus? 2 to 8.75 on the compiled Fellow Opus chart. Start in the middle of that window, brew once with everything else held steady, then move in small steps on taste.

My aeropress tastes wrong on the Fellow Opus. Which way do I move? If the cup tastes thin, sour or watery, go finer. If the plunge is hard work and the cup tastes bitter or muddy, go coarser. Change one thing at a time and write down what you did.

Where do these Fellow Opus numbers come from? Honest Coffee Guide's compiled Fellow Opus chart, read from the published table and cited in the sources list on this page. It is a compiled chart built from that site's research and reader feedback, not a manufacturer document, so treat every range as a window rather than a verdict.

Sources

• [1] Honest Coffee Guide's Fellow Opus chart: https://honestcoffeeguide.com/fellow-opus-grind-settings/
• [2] Honest Coffee Guide's KINGrinder K2 chart: https://honestcoffeeguide.com/kingrinder-k2-grind-settings/
• [3] Honest Coffee Guide's KINGrinder K4 chart: https://honestcoffeeguide.com/kingrinder-k4-grind-settings/
• [4] Honest Coffee Guide's Turin DF54 chart: https://honestcoffeeguide.com/turin-df54-grind-settings/
• [5] Honest Coffee Guide's Turin DF64V chart: https://honestcoffeeguide.com/turin-df64v-grind-settings/
• [6] Honest Coffee Guide's Turin SD40 V1 chart: https://honestcoffeeguide.com/turin-sd40-v1-grind-settings/