Moving Up: How to Translate Your Bullet R1 Roast Profiles to the R2 and R2 Pro

For years, the Aillio Bullet R1 has been the undisputed heavyweight champion of the countertop roasting world. But with the release of the Bullet R2 (1700W / 10 steps) and R2 Pro (2300W / 14 steps), many roasters are making the leap to the next generation.

The biggest hurdle when unboxing your shiny new machine? Translating your tried-and-true R1 roast profiles.

Because the R2 series completely overhauls the internal induction boards and power scaling, you can’t just blindly plug in your old numbers. Here is exactly how the new power steps stack up, and how to manually translate your profiles without ruining a single batch of specialty coffee.

Demystifying the Power Scales: R1 vs. R2 vs. R2 Pro

The classic Bullet R1 maxes out at 1550W split across 9 power steps (P1–P9).

When Aillio designed the R2 and R2 Pro, they didn't just slice that same 1550W window into smaller segments. Instead, they vastly increased the total wattage ceiling of the machines to give roasters more headroom and faster recovery times.

• The Bullet R2 bumps the ceiling to 1700W across 10 steps.

• The Bullet R2 Pro blasts all the way up to 2300W across 14 steps.

Because the underlying wattage calculation changes depending on which model you own, the step numbers don't translate linearly. Here is how the raw power roughly breaks down:

The Blueprint for Manual Translation

Because RoasTime does not feature an automated "profile converter" to shift the hardware commands between generations, you will want to lock your old R1 profile on your screen as a background overlay template and manually map your moves using the following zones.

The Sweet Spot: The Mid-Range (P5 to P7)

If your R1 profile relies heavily on the mid-range to control your Rate of Rise (RoR) through the Maillard phase, you are in luck. Between 850W and 1200W, the steps map almost perfectly across all three machines.

• R1 P6 (~1000W) is an identical match to R2 Pro P6 and virtually the same as R2 P6.

• If you usually drop to P6 or P7 to coast into First Crack on your R1, you can generally use those exact same step numbers on the R2 or R2 Pro.

The Shift: The High End (R1 P8 to P9)

This is where R1 users usually get tripped up. On the R1, P9 is your absolute maximum throttle. On the new machines, that same amount of energy sits much lower on the dial.

• To replicate the maximum power of an R1 on the standard R2, you'll want to use P9.

• To replicate the maximum power of an R1 on the R2 Pro, you actually need to step up to P10.

Uncharted Territory: P11 to P14 (R2 Pro Only)

If you are upgrading to the R2 Pro, steps 11 through 14 give you access to a massive reserve of thermal energy that the R1 simply couldn't touch.

You won't use these steps to replicate old R1 profiles, but you will use them to push the machine's new 1.2kg maximum capacity. P12 through P14 allow you to charge larger batch sizes or achieve lightning-fast preheats without risking an immediate RoR crash when the green coffee hits the drum.

The Secret Variables: Efficiency & Airflow

When you test your translated profiles for the first time, keep two massive hardware upgrades in mind that will alter how the coffee handles the heat:

1. Power Delivery Precision
The R1 has a power delivery margin of error of about ~2%, meaning local line voltage fluctuations in your building can subtly drift your roast. The R2 and R2 Pro narrow that variance down to a razor-sharp ~0.5%. The heat is cleaner, faster, and much more efficient - so your R2 profile might feel slightly more aggressive than your old R1 graph even if the wattages match.

2. FlowSense™ Technology
On the R1, a clogging chaff filter slows down your convective airflow over the course of back-to-back roasts. The R2 series introduces FlowSense, which actively monitors and adjusts pressure to keep your actual airflow uniform. Because your fan speeds are now completely stable, you won't have to over-compensate with extra power modifications late in your roasting sessions.

The Verdict

Don’t be intimidated by the new 10 and 14-step control panels. Treat the middle of the scale (P5–P7) as your grounding anchor, remember that your old R1 maxes out at P9/P10 on the new units, and use the extra headroom to play with larger batches and sharper roast profiles than ever before.