Fellow Opus cold brew grind setting: the verified range

Fellow Opus cold brew grind setting: the verified range

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Set a Fellow Opus between 7.25 and 11 for cold brew, per Honest Coffee Guide's compiled Fellow Opus chart. Start in the middle of the window and adjust on taste: finer if the concentrate tastes flat or weak even after a full steep, coarser if the batch tastes harsh, filters slowly, or leaves sludge in the jar.

Fellow Opus cold brew settings, and the bands either side

What Setting on the Fellow Opus
Cold brew window 7.25 to 11 [1]
The French press band on the same chart 6 to 11 [1]
The cold drip band on the same chart 7.5 to 11 [1]
Full grind range of the grinder 230 to 1160 microns [1]

The neighbouring bands are there for context. If your cold brew 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 cold brew wants this part of the dial

Cold brew is a long immersion at room temperature or in the fridge, and cold water pulls flavour out slowly. The coarse setting is what keeps the brew from turning bitter and sludgy over that long contact, and it is what lets you filter the batch without a fight.

Dial it in from the chart in 3 steps

1. Set the middle of the cold brew window above and brew once, changing nothing else. 2. Taste against the two failure directions: finer if the concentrate tastes flat or weak even after a full steep, coarser if the batch tastes harsh, filters slowly, or leaves sludge in the jar. The full logic is in the cold brew ratio and cold brew tips. For the rest of the recipe, see the best grinders for cold brew. 3. Move in small steps and write each attempt down; the free dial-in logbook exists for exactly this. Steep length is the other lever. Fix the grind at the coarse end first, then adjust time rather than chasing both at once.

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.

Cold brew on other popular grinders

Grinder Cold brew setting
Turin DF64V 70 to 90 [2]
Turin SD40 15.2 to 19 [3]
Fellow Ode Gen 1 4 to 11 [4]
Cuisinart CBM-18 6 to 13 [5]
Baratza Sette 270 25 to 31 [6]

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

More on this

FAQ

What grind setting is cold brew on the Fellow Opus? 7.25 to 11 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 cold brew tastes wrong on the Fellow Opus. Which way do I move? If the concentrate tastes flat or weak even after a full steep, go finer. If the batch tastes harsh, filters slowly, or leaves sludge in the jar, 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

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