Which to buy · Every setting
Option-O Lagom P100 vs Rancilio Rocky
Two grinders cross-shopped at the same money. The Lagom P100 is numbered 0–10; the Rocky is numbered 0–55.
Which to buy
Choose the
Lagom P100 if you…
- want 98 mm flat burrs
- want variable speed, 200 to 1,700 rpm
- want stepless adjustment — each 0.1 line moves the burr 7.5 microns
Choose the
Rocky if you…
- want a smaller grinder — 7 kg
- grind from a 0.3 kg hopper
- want stepped settings you can return to — up to 50 on the front ring
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.
Neither is sold new. Rancilio no longer lists the Rocky (its page now returns 404) and sells the Stile as its home grinder. The P100 no longer appears in Option-O's shop, though its product page is still up, and Option-O hasn't named a replacement.
Sources: Option-O — LAGOM P100 · Option-O — Shop · Rancilio Group — Rocky (archived Jan 2022) · Rancilio Group — Rocky SD specifications (archived May 2022) · Rancilio Group — Stile
| Lagom P100 | Rocky | |
|---|---|---|
| Brand | Option-O | Rancilio |
| Scale | Numbered dial | Numbered dial |
| Dial range | 0 – 10 | 0 – 55 |
| Burrs | Flat | Flat |
| Espresso → filter | 6.3 numbers | 20 numbers |
| Filter → coarse | 2.5 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 5 sits at grind index 26.8 on the Lagom P100 but 0 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.
| Lagom P100 | Rocky |
|---|---|
| 0.5 | 5 |
| 2.1 | 9 |
| 3.6 | 14 |
| 4.8 | 18 |
| 5.9 | 22 |
| 6.9 | 26 |
| 7.5 | 29 |
| 8.1 | 32 |
| 8.7 | 36 |
| 9 | 39 |
| 9.1 | 42 |
| 9.2 | 45 |
| 9.3 | 48 |
| Rocky | Lagom P100 |
|---|---|
| 5 | 0.5 |
| 9 | 2.1 |
| 14 | 3.6 |
| 18 | 4.8 |
| 22 | 5.9 |
| 26 | 6.9 |
| 29 | 7.5 |
| 32 | 8.1 |
| 36 | 8.7 |
| 39 | 9 |
| 42 | 9.1 |
| 45 | 9.2 |
| 48 | 9.3 |
Side by side, by brew method
Where each grinder lands for the same brew, worked out from its own dial curve.
| Method | Lagom P100 | Rocky |
|---|---|---|
| Espresso | 1.5 | 8 |
| Moka pot | 3.4 | 13 |
| AeroPress (short steep) | 4.8 | 18 |
| Pour over — V60 / cone | 6.5 | 24 |
| Siphon | 6.9 | 26 |
| Pour over — flat bottom | 7.2 | 27 |
| Steep and release — Clever / Switch | 7.4 | 28 |
| Drip / batch brew | 7.5 | 29 |
| Cupping | 7.6 | 30 |
| Chemex | 8.1 | 32 |
| French press | 9 | 38 |
| Cold brew | 9.1 | 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.
Option-O Lagom P100
Rancilio Rocky
Dialing in the Lagom P100
A large flat-burr single-dose grinder aimed at people who want commercial burr size at home. As with the rest of the Lagom range, the burr set you fit changes the grind character more than the dial position does.
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.