Zero Coffee Grinder: Everything You Need to Know About the Option-O Lineup

The first time I used an Option-O Zero grinder at a friend's coffee bar, I was honestly a little confused by the name. "Zero" refers to Option-O's design philosophy of zero retention, meaning the grinder holds back virtually none of your coffee grounds inside the burr chamber. Every gram you put in comes back out. That might sound like a small detail, but it changes the way you think about single-dosing and daily grinding.

Option-O makes the Zero lineup, which includes the Lagom Mini, Lagom P64, and Lagom P100. These are premium single-dose grinders designed for home and prosumer use. They are not cheap. Prices range from around $300 for the Mini to over $2,000 for the P100. But they have earned a loyal following among home baristas who want cafe-level grind quality without the waste and hassle of traditional hopper-fed grinders.

The Zero Retention Philosophy

Most coffee grinders retain somewhere between 1 and 8 grams of coffee inside the burr chamber, chute, and exit path. When you switch between beans or grind sizes, those leftover grounds mix into your next dose. This creates stale flavors and inconsistent dosing.

Option-O designed the Zero grinders to minimize this problem. The Lagom P64, for example, retains less than 0.2 grams on average. The P100 is similar. You weigh your beans, put them in the hopper, grind, and get almost exactly that weight back in the cup.

Why does this matter in practice? Three reasons.

Single-dosing becomes accurate. If you weigh out 18 grams for an espresso shot, you actually get 18 grams in your portafilter. No guessing, no purging old grounds, no waste.

Bean switching is painless. I like rotating between two or three different coffees during the week. With a low-retention grinder, I can switch bags without contaminating the next cup with yesterday's beans.

Less waste. Retained grounds go stale inside the grinder. With a traditional hopper grinder, you lose a few grams every session. Over a year, that adds up to pounds of wasted coffee.

The Lagom P64 is the model most home users end up buying. It sits at around $1,100 to $1,400 depending on the burr set, which makes it a serious investment but still within reach for dedicated home baristas.

Specifications

  • Burrs: 64mm flat burrs (SSP or stock option available)
  • Motor: DC motor, low RPM for reduced heat and noise
  • Retention: Under 0.2 grams
  • Weight: About 15 pounds
  • Grind adjustment: Stepless, with a rotating collar

The P64 comes with Option-O's stock burrs, but many buyers immediately swap in SSP burrs (High Uniformity, Multi-Purpose, or Cast V2) for different flavor profiles. This modularity is part of the appeal.

How It Grinds

I have used the P64 with SSP Multi-Purpose burrs for espresso and pour-over. The grind consistency is excellent at both ends of the spectrum. Espresso shots pull evenly with minimal channeling, and pour-over brews have a clean, bright flavor with good body.

The stepless adjustment collar moves smoothly and holds its position well. Dialing in for espresso takes a few shots, as with any grinder, but once you find your setting, it stays put.

The motor is quieter than I expected. It is not silent, but compared to a Eureka Mignon or Baratza Sette, the P64 grinds at a conversational volume level.

The Lagom Mini and P100

Lagom Mini

The Mini is the entry point to the Zero lineup at around $300 to $400. It uses smaller 40mm burrs (either steel or titanium-coated) and a hand crank option. It is designed for people who want the zero-retention approach without the premium price tag.

The trade-off is speed and capacity. The Mini grinds slower than the P64, and the smaller burrs produce slightly less uniform results. For pour-over and AeroPress, it performs well. For espresso, it works but does not match the P64's consistency.

Lagom P100

The P100 is the flagship. It uses massive 98mm flat burrs (usually SSP) and a powerful motor. This grinder competes with commercial equipment that costs two to three times as much. At over $2,000, it is aimed at the most serious home baristas and small cafe owners.

The P100 grinds fast, quiet, and absurdly consistent. If you are pulling 8 to 12 shots a day for your household and you want the best possible grind quality, this is the top of the home grinder market.

Who Should Consider a Zero Grinder?

The Zero grinders are not for everyone. They are premium products designed for people who already know they care about grind quality and are willing to pay for it.

You should consider a Zero grinder if:

  • You single-dose your coffee (weigh beans per cup rather than filling a hopper)
  • You switch between multiple beans regularly
  • You brew espresso at home and want to stop purging wasted grounds
  • You appreciate build quality and are buying a grinder you will keep for 10+ years

You should probably look elsewhere if:

  • You are new to specialty coffee and still figuring out what you like
  • Your budget is under $300
  • You use a drip coffee maker and do not need precise dosing
  • Speed is more important than precision

For a wider comparison of grinders at various price points, our best coffee grinder roundup is a good starting point. If you want to see what else ranks at the top end, our top coffee grinder guide covers the competition.

Common Complaints and Honest Drawbacks

No grinder is perfect, and the Zero lineup has a few things worth mentioning.

Price. The P64 at $1,100+ and the P100 at $2,000+ are hard to justify unless you are deeply into the hobby. You can get a great cup of coffee from a Baratza Encore ($170) or a 1Zpresso JX-Pro ($170). The Zero grinders are for people chasing the last 10% of quality improvement.

Availability. Option-O is a small company, and demand often exceeds supply. Wait times of several weeks are common. Check their website for current stock before planning a purchase.

Burr choice paralysis. With multiple SSP options and stock burrs available, figuring out which burr set to buy can be overwhelming. Here is my simple guide: SSP Multi-Purpose burrs are the best all-around choice for people who brew both espresso and filter. High Uniformity burrs lean toward filter brewing. Cast V2 burrs lean toward espresso.

No built-in scale. You need to weigh your beans before grinding. This is standard for single-dose workflow, but if you are coming from a hopper grinder with a timer, it adds a step.

Frequently Asked Questions

What does "zero retention" actually mean?

It means the grinder holds back almost no coffee grounds inside the mechanism after grinding. The Lagom P64 retains less than 0.2 grams on average. Traditional grinders can retain 2 to 8 grams.

Are SSP burrs worth the upgrade over stock burrs?

For most users, yes. SSP burrs (especially the Multi-Purpose set) produce noticeably more uniform grounds than the stock burrs. The difference is more obvious in espresso than in filter brewing. The upgrade costs $80 to $150 depending on the burr type.

Can I use the Lagom P64 for both espresso and pour-over?

Absolutely. The stepless adjustment covers the full range from Turkish-fine to French press-coarse. Switching between espresso and pour-over takes about 15 seconds of turning the adjustment collar. This is one of the P64's biggest strengths.

How does the Lagom P64 compare to the Niche Zero?

Both are single-dose grinders in a similar price range. The Niche Zero uses 63mm conical burrs, while the P64 uses 64mm flat burrs. Flat burrs generally produce higher clarity (brighter, more distinct flavors) while conical burrs produce more body (richer, rounder). Neither is objectively better, but flavor preference should guide your choice.

Bottom Line

The Option-O Zero grinders are some of the best home grinders you can buy, period. They are expensive, they are sometimes hard to find, and they require a single-dose workflow that adds a few extra seconds to your routine. But if you care about tasting every dollar you spend on specialty beans, the near-zero retention and outstanding grind consistency make these grinders worth serious consideration. Start with the P64 if you are ready to invest, or the Lagom Mini if you want to test the waters first.