Option-O Lagom 01 Review 2026: 102 mm Benchmark Grinder

€2,999. CHF 2,999. The Option O Lagom 01 is the most expensive single dosing grinder we have ever tested – and at the same time the official filter coffee grinder of the World Brewers Cup Championship 2026–2029. A successor to the P100, our unit came equipped with 102 mm Mizen 102OM burrs (Blind Burrs), stepless RPM adjustment from 200 to 1,700, and a weight that puts some espresso machines to shame: 15.3 kg.

We did not buy this grinder. It was loaned to us by Urs Rotzinger, the German Brewers Cup champion, who uses the 01 on his road to the World Championship. Thanks, Urs.

The question hanging over this review: What justifies €3,000 for a grinder?

Design & Build Quality

The Lagom 01 is not a design piece – at least not in our eyes. It is a statement of ruggedness. 15.3 kg of CNC-machined 6061-T6 aluminium, 17 cm wide, 30 cm deep, 36 cm tall. None of the elegance you might know from the P64 or the Casa – but a grinder that feels like it was built for the next twenty years.

Build quality is what we have come to expect from Option O: solid throughout, everything well thought out. The burrs are nearly tool-free to access – lift the top, twist, pull out. Technically you need a thin pin to loosen them, but it is close enough to tool-free that we rate the cleaning accessibility as excellent. More importantly: after reassembly you are back at exactly the same grind setting. No recalibration needed.

The magnetic dosing cup (50 g) sits securely. It is quite tall, though, to reach all the way under the chute. That makes it functional but takes away some elegance during workflow. The more comfortable option: the included portafilter holder, which snaps in magnetically and guides the grounds straight into the portafilter.

Burr Set & Technology

Mizen 102OM Flat Burrs, in the Blind Burrs configuration. The burrs are bolted from behind, which contributes to grind uniformity. RPM control ranges from 200 to 1,700 RPM, adjustable via a dial scaled from 1 to 9. That range is massive and opens up a wide playing field for both filter coffee and espresso.

Lower RPMs generally produce narrower main peaks in the particle size distribution and more clarity; higher RPMs deliver more body. More on that in the PSD section below.

Grind adjustment is stepless, with each major increment moving the burrs by 7.5 micrometres. Less than one full rotation separates espresso from filter coffee. That makes switching between the two very comfortable and improves the ability to find your way back to a setting. With other grinders you often need to note how many times the 1 passed the marker when going from espresso to filter. Built into the grinder are a knocker to clear the chute and a purge function that briefly ramps up RPM at the end of the grind cycle to blow out the temporary retention.

Grind Speed & Noise

75 g in 10 seconds. 18 g in 4 seconds. At espresso grind settings. These are numbers we normally see from top-tier commercial grinders. The motor (peak 1,300 W, brushless DC) and the large burrs make this possible.

The flip side: 89.2 dB. The 01 is loud. Not a piercing whine – more of a turbine sound that ramps up briefly and then stops. We are right at the boundary between our medium and loud categories.

The consolation: at 4 seconds of grinding time for an espresso, the noise is over quickly. But if you plan to grind early in the morning while the rest of the household is still asleep – you should know.

Grind Temperature & Consistency

In the temperature test (5 × 18 g, 20 seconds apart) we stay below 30.5 °C throughout. The average is 29.3 °C. Despite the enormous speed, no significant heat build-up. Top category.

What this means in practice: you can grind several doses back to back without losing volatile aromatics to heat. For light roasts, where thermal stress becomes noticeable quickly, that matters.

Consistency confirms the picture: 0.04 g standard deviation across 15 consecutive grinds. Outstanding. The 01 reliably delivers the same output, grind after grind.

Retention

Retention is the most exciting measurement with 102 mm burrs. The 01's grinding chamber has a lot of air space between the carrier fins – in a conventional grinder of this size you would expect double-digit retention figures.

We measured retention in two configurations:

Without purge function (start-stop mode): 0.7 g temporary, 0.1 g permanent, 0.8 g total.

With purge function (auto mode): 0.4 g temporary, 0.1 g permanent, 0.5 g total.

0.5 g total retention with 102 mm burrs. That is genuinely impressive. We would not have been surprised by much higher numbers. The carrier fin design and the purge function push retention to a level that many significantly smaller grinders cannot match.

Single Dosing Performance

18 g in, 18 g out. Across five consecutive grinds we measure deviations between 17.9 and 18.0 g, as long as the purge function is active.

The built-in anti-static system works remarkably well. Unlike the P64, which is barely usable without RDT, you can use the 01 without any water spray. A bit of static along the dosing ring edge, but nothing that disrupts the workflow.

With RDT the output weight increases slightly above 18 g (18.1–18.2 g) because the water adds mass.

If you want to grind directly into the portafilter: the included portafilter holder is the more comfortable route. Magnetic, well positioned, the grounds land where they should. A genuinely nice piece of engineering. And a real design advantage that the grounds fall straight down into the portafilter rather than sliding down a chute at an angle, as with the vast majority of espresso grinders.

Grind Setting Repeatability

In the adjustment test (espresso → ristretto → lungo → back to espresso) the 01 demonstrates what its stepless adjustment and mechanical precision are worth.

Peak width at T4 (starting espresso setting): 183.9 µm. After the full adjustment sequence back to espresso (T7): 182.5 µm. A deviation of 1.4 µm – essentially identical. You come back to exactly where you started.

The x50 value deviates between T4 (274 µm) and T7 (287 µm) by about 12 µm, which is within normal variance.

What this means in daily use: if you switch between espresso and filter, you do not need to recalibrate after dialling back. The grinder delivers repeatable results. Excellent.

Particle Size Distribution

We analysed the particle size distribution in cooperation with ZHAW using a Retsch Camsizer X2.

Espresso setting (T4):

x50: 274 µm | Fines (Qf <100 µm): 32.7% | 60% coarse peak width: 184 µm

A peak width of 184 µm is narrow. The grind is uniform, extraction correspondingly even. In the cup this shows as clarity and structure – the espresso does not taste "scattered". For comparison: once peak width exceeds about 300 µm, we regularly encounter espressos where individual flavour notes fall apart.

The fines content of 33% delivers enough body without overloading the espresso. This suits medium-light roasts as well as more classic profiles. If you prefer very light, complex roasts: lowering the RPM will reduce fines further.

RPM comparison (filter coffee):

We also tested the 01 for filter coffee at two RPM settings: minimum (200 RPM) and maximum (1,700 RPM). Both cups are clean and balanced. The low RPM delivers a narrower peak, more clarity, less bitterness. The high RPM brings slightly more body but a slightly drier finish.

Even at maximum RPM the 01 has so much clarity from its tight particle distribution that the difference is subtler than expected. Both settings work well. RPM control is a tool for fine-tuning, not a requirement.

Tasting

In the cup the 01 delivers what the particle distribution promises: clarity. That is the word that comes to mind most often with this grinder.

Espresso with Apas (our reference coffee): Lots of sweetness, soft texture, clean acidity without sharpness. Body leans towards the gentler side – not a heavy, pressing espresso. This suits medium-light roasts well, but can also be dialled in cleanly for somewhat darker profiles.

In the filter coffee test (Amigo): Surprisingly low bitterness, a clean cup with great balance. Both RPM settings produced cups where the grinder was not the limiting factor.

And then there was a light, complex coffee from the Kaffeemacher orange line called Yulieth. Extreme clarity, lots of sweetness, vibrant acidity. The grinder extracts the maximum from coffees like these without over-extracting.

Filter Coffee

The 01 is the official WBrC grinder for 2026–2029. That is no coincidence. If filter coffee is your primary application, you get a grinder that handles even 40 g doses for batch brew quickly and with stable temperatures.

The combination of speed, RPM control, and tight particle distribution makes the 01 interesting for filter coffee in professional settings. For home use even more so – provided you have the counter space.

The limitation: a full bag of coffee does not fit underneath the grinder. If you need to grind whole packages for customers, you will need a different solution.

Verdict

The Option O Lagom 01 is the benchmark in most of our measurement categories among all grinders we have tested to date. 0.5 g retention with 102 mm burrs, 29.3 °C grind temperature at 75 g/10 sec, 0.04 g standard deviation, 184 µm peak width, near-perfect repeatability. The numbers speak for themselves.

Strengths:

– Particle distribution and cup quality at benchmark level
– Retention outstanding for this burr size
– Temperature, consistency, speed: top marks across the board
– RPM control as a tool for flavour shaping
– All-purpose (espresso + filter) within one rotation
– Anti-static works without RDT

Weaknesses:

– 89.2 dB: loud
– €2,999 / CHF 2,999: high entry price
– Design functional, not elegant
– Dosing cup handling somewhat bulky

Who is it for?

High-end home baristas who want one grinder for espresso and filter without compromising on particle distribution. For specialty cafés as a filter grinder or as a high-throughput single dosing solution.

Who is it not for?

Anyone looking for a sleek, quiet grinder for the kitchen counter. Anyone who cannot or does not want to invest €2,999 in a grinder. Anyone who already has a dedicated espresso grinder and does not brew filter coffee.

If the 01 cost €1,500, the recommendation would be clear-cut for anyone who wants both. At €2,999 it is an investment you need to make deliberately. But what you get for the money is currently hard to beat. That said, the qualitative difference compared to some grinders in the €1,400–2,000 range (such as the DF83 V2) is mainly speed. In terms of cup quality, good grinders with good burrs do not differ that much.

You can of course order the grinder directly from Option-O.

Technical Specifications

Find all our espresso grinder reviews in the espresso grinder overview.