Which to buy · Every setting
Mahlkönig X54 vs Rancilio Rocky
Two grinders cross-shopped at the same money. The Rocky is numbered 0–55; the X54 is numbered 1–35.
Which to buy
Choose the
X54 if you…
- want four timed presets on an LED display
- want stepless adjustment, espresso to cold brew
- want a quiet grinder — Mahlkönig quotes below 70 dB(A)
Choose the
Rocky if you…
- are buying used — Rancilio no longer sells it new
- want stepped settings you can return to — up to 50 on the front ring
- pair it with a Rancilio Silvia — Rancilio pitched it as its partner
Shop links are affiliate links: BrewMark earns a commission if you buy through one, at no extra cost to you. The verdicts were written without regard to it.
Rancilio no longer lists the Rocky (its page now returns 404) and sells the Stile as its home grinder, so you'd be buying the Rocky used.
Sources: Rancilio Group — Rocky (archived Jan 2022) · Rancilio Group — Rocky SD specifications (archived May 2022) · Rancilio Group — Stile · Mahlkönig USA — X54 Allround Home Grinder
| X54 | Rocky | |
|---|---|---|
| Brand | Mahlkönig | Rancilio |
| Scale | Numbered dial | Numbered dial |
| Dial range | 1 – 35 | 0 – 55 |
| Burrs | Flat | Flat |
| Espresso → filter | 20.1 numbers | 20 numbers |
| Filter → coarse | 13.9 numbers | 23 numbers |
The same number means different things
Both grinders use a numbered dial, which makes it tempting to copy a number straight across. Setting 18 sits at grind index 34.3 on the X54 but 25.4 on the Rocky — far enough apart to change the cup.
Converting a setting
If a recipe quotes a setting for one of these grinders, read across for the equivalent on the other. Rows are spaced evenly by grind size, not by dial number — on a conical burr those are not the same thing.
| X54 | Rocky |
|---|---|
| 1 | 5 |
| 4.6 | 9 |
| 8.3 | 14 |
| 12.9 | 18 |
| 17.4 | 22 |
| 21.6 | 26 |
| 23.9 | 29 |
| 26.2 | 32 |
| 28.6 | 36 |
| 30.4 | 39 |
| 31.9 | 42 |
| 33.5 | 45 |
| 35 | 48 |
| Rocky | X54 |
|---|---|
| 5 | 1 |
| 9 | 4.6 |
| 14 | 8.3 |
| 18 | 12.9 |
| 22 | 17.4 |
| 26 | 21.6 |
| 29 | 23.9 |
| 32 | 26.2 |
| 36 | 28.6 |
| 39 | 30.4 |
| 42 | 31.9 |
| 45 | 33.5 |
| 48 | 35 |
Side by side, by brew method
Where each grinder lands for the same brew, worked out from its own dial curve.
| Method | X54 | Rocky |
|---|---|---|
| Espresso | 3.1 | 8 |
| Moka pot | 7.4 | 13 |
| AeroPress (short steep) | 12.9 | 18 |
| Pour over — V60 / cone | 20 | 24 |
| Siphon | 21.7 | 26 |
| Pour over — flat bottom | 22.5 | 27 |
| Steep and release — Clever / Switch | 23.3 | 28 |
| Drip / batch brew | 23.9 | 29 |
| Cupping | 24.5 | 30 |
| Chemex | 26.1 | 32 |
| French press | 29.9 | 38 |
| Cold brew | 32.8 | 44 |
The shape of each dial
Where the connectors bunch, that grinder’s dial is compressed and single steps count for more. Comparing the two shapes tells you which gives finer control, and where.
Mahlkönig X54
Rancilio Rocky
Dialing in the X54
Mahlkönig's home grinder, and much more conventional than the EK that shares its badge. Genuinely all-purpose with a usable espresso end, though the resolution down there is nothing like a dedicated espresso grinder's.
Dialing in the Rocky
A stepped espresso grinder that has been the budget recommendation for a very long time. The 55 steps across 50mm flat burrs are its limitation — for espresso you will sometimes want a setting between two of them and there is not one, and a single step can move a shot by seconds. Twenty of those steps cover espresso through filter, which is more resolution than the fine end usually gets at this price. Two things make it an espresso grinder in practice rather than a general one: changing setting means holding the locking lever while twisting the hopper, and it keeps a couple of grams in the chute, so every switch between espresso and pour over costs you both fiddling and coffee. Most owners pick one end and stay there.