Favero Assioma Duo vs Uno: Which Power Meter is Right for You?

Alright, let's talk pedals. Not just any pedals—power meter pedals. If you're a cyclist who lives and breathes watts, FTP, and the sweet science of going fast, you’ve probably heard of the Favero Assioma Duo and Uno.

But which one do you actually need? Or want? Or, let’s be honest, can afford without selling a kidney?

Let’s dive into the Duo vs Uno debate and figure out which one's the better fit for you.

Quick Intro: What Even Is a Power Meter Pedal?

If you're new to the scene, a power meter measures how much power (in watts) you’re putting down while pedaling. Think of it as your personal cycling truth-teller—it tells you what your legs are actually doing.

Pedal-based power meters like the Favero Assiomas are awesome because they’re:

- Super easy to install (no fancy tools)
- Transferable between bikes
- Super accurate

Now, Favero makes two flavors:

- Assioma Uno – Single-sided (left pedal only)
- Assioma Duo – Dual-sided (left + right pedals)

Let's Break It Down: Uno vs Duo

1. Sided Power Measurement: Left vs Both

- Uno measures just your left leg and doubles the value.
- Duo measures both legs independently.

Why it matters: If your leg power is perfectly balanced (50/50), the Uno is fine. But let’s be real—not everyone pedals like a robot. If you’re recovering from injury, have asymmetry, or just like things super precise (hi, Type-A friends!), the Duo gives you the full picture.

"I upgraded to Duo after realizing I was favoring my right leg. Game changer!"

Verdict: Duo wins for data nerds and serious racers. Uno is solid for budget-conscious riders or beginners.

2. Price Tag (aka The Ouch Factor)

Let’s talk about money.

- Uno: ~$495
- Duo: ~$759

Yep, the Duo is pricier. But you’re paying for two sensors and double the data.

If you're building your dream setup and every dollar counts, start with Uno. You can always upgrade to Duo later—Favero sells an upgrade kit (super cool move, by the way).

Verdict: Uno for budget entry. Duo for go-all-in riders.

3. Installation: Can You Handle a Wrench?

This one’s easy.

Both models install like regular pedals. No crank pulling, no BB faffing.

Steps:

Remove your old pedals.
Thread in the Assiomas.
Use the included tightening wrench.
Pair with your bike computer (Garmin, Wahoo, etc.).

Bonus: They auto-calibrate. And yes, that’s as great as it sounds.

Verdict: Tie. Super user-friendly either way.

4. Battery Life & Charging

Favero nailed this part.

- Both have built-in rechargeable batteries.
- You get up to 50 hours on a single charge.
- Magnetic USB chargers make top-ups painless (no weird contacts to clean).

"I’ve ridden back-to-back centuries and still didn’t need a recharge. Love it."

Verdict: Tie. Solid battery life.

5. Accuracy & Techy Bits

Both models offer:

- +/- 1% power accuracy
- Bluetooth & ANT+ connectivity
- IAV (Instantaneous Angular Velocity) for smooth data

Translation? These pedals don’t flinch, even when you’re sprinting uphill half delirious.

Verdict: No difference. Same tech, same precision.

Real-World Use: Who Should Get What?

Go for Assioma Uno if:

- You're new to training with power.
- You're on a budget.
- You’re not super concerned about L/R balance

Choose Assioma Duo if:

- You’re training for races or performance gains.
- You want to fine-tune your pedaling technique.
- You’ve had injuries and want to monitor imbalance

"The Duo helped me fix a subtle imbalance after ACL rehab. Worth every cent."

Calibration: How to Keep It Honest

Good news: both units auto-calibrate.

Still, every now and then (especially after a firmware update or big temperature shift), you should manually zero-offset.

Steps:
1. Clip out.
2. Keep the bike upright.
3. Use your head unit or app to zero the meter.

Done in under a minute.

Compatibility: What Shoes & Setups Work?

Pedals:

- Look Keo cleat compatible (standard red or black float options)

Devices:

- Any cycling computer that supports ANT+ or Bluetooth: Garmin, Wahoo, Hammerhead, etc.
- Works with apps like Zwift, TrainerRoad, and Strava

Indoor/Outdoor:

Swap between your trainer bike and road setup with ease.

"Switched from my gravel rig to the indoor bike in five minutes. So easy."

Troubleshooting Tips

Power Dropouts?

- Make sure firmware is up to date.
- Check Bluetooth interference.
- Clean and reseat the charging contacts

Not Showing on Device?

- Re-pair via Bluetooth or ANT+
- Spin the cranks to wake the pedal

Uneven Readings?

- Check cleat alignment
- Perform manual zero-offset

Bonus Section: Favero Assioma Upgrade Path

Started with Uno and now want to go Duo? You don’t need to rebuy everything. Just grab the Uno Upgrade Kit, which includes the right pedal sensor and everything needed to sync up.

It’s plug-and-play—and way cheaper than buying a whole new Duo setup.

Final Thoughts: Which Should You Pick?

If power data is your training bible and you obsess over every watt... go with the Duo. It’s detailed, accurate, and helps fine-tune performance like a coach in your crankset.

But if you’re just dipping your toes into structured training or need a wallet-friendly intro, Uno delivers all the essential power data to level up your riding.

Either way? You’re making a solid choice. Favero nailed it with these pedals.