Favero Assioma DUO-Shi – The Best Dual-Sided Power Meter for Shimano® Pedals

Looking to upgrade your Shimano power meter setup? Favero Assioma DUO-Shi is the perfect solution for Shimano road bike users who want precision data without changing their pedal system. Now you can keep using your Shimano® SPD-SL® pedal bodies—like the PD-R8000, PD-R7000, PD-6800, PD-R550, and PD-R540—while enjoying the reliability and accuracy of Favero technology.

Simple Installation with Your Existing Pedals
Installing DUO-Shi into your Shimano® SPD-SL® pedals is easy and fast. No extra tools or technicians required. Just follow our video tutorial and get riding within minutes. It's a true Shimano power meter upgrade that delivers pro-level performance with minimal effort.

Optimized Q-Factor for Better Fit and Comfort
The DUO-Shi has a slightly wider Q-factor (+64mm or +65mm depending on the pedal model) compared to the LOOK® version (+54mm). However, our beta testers, including riders of all sizes, found it extremely comfortable. Because Q-factor is influenced by your anatomy—like pelvis width and hip alignment—this setup can even improve your natural pedal stance.

Move Easily Between Bikes
Switching between bikes? No problem. DUO-Shi pedals move like any standard pedal—no bike mechanic or special equipment needed. This makes it a top choice for cyclists with multiple bikes or for those who need flexibility in their setup.

Advanced Cycling Metrics & Wattage Tracking
DUO-Shi isn’t just a bike power measurement tool. With IAV Cycling Dynamics, it provides advanced performance insights like Power Phase and Rider Position. These metrics help you refine your technique and see how changes in your form impact your output. It's the ultimate cycling wattage tracker.

Accurate Power, Every Ride
Using a built-in gyroscope and IAV Power system, DUO-Shi measures actual angular velocity throughout your pedal stroke. Unlike some meters, it stays accurate even when using oval chainrings, riding uphill, or sprinting. You get consistent, ±1% precision in all conditions.

Real Dual-Sided Power Analysis
As a dual-sided power meter, DUO-Shi tracks each leg independently. This lets you measure Total Power and L/R Balance, ideal for identifying strength imbalances or improving pedal efficiency. It’s trusted by serious athletes for accurate, balanced training.

Total Device Compatibility
Thanks to Bluetooth and ANT+ support, DUO-Shi pairs easily with your favorite bike computers or smartphones—whether you use iOS or Android. It's one of the most versatile and performance cycling gear options out there.

Durable, Waterproof & Lightweight
Each pedal is built to withstand the elements. With a lightweight design and shock-resistant resin casing, DUO-Shi is road cycling efficiency tracker approved—rain or shine.

Rechargeable & Eco-Conscious
No need for disposable batteries. The DUO-Shi uses a rechargeable battery that delivers over 50 hours of use per charge. It’s not just efficient, it's green—a small but impactful step toward sustainable cycling.

Engineered in Italy. Tested for Excellence.
Favero Electronics manufactures and tests each unit in-house in Italy, ensuring unmatched quality, performance, and compliance with international standards.

Assioma DUO-Shi – Technical Specifications

Power Measurement:
- Dual-sided (measures power from both left and right pedals)
- Accuracy: ±1%
- Power Calculation: IAV (Instantaneous Angular Velocity) system
- Fully compatible with oval chainrings

Sensors & Technology:
- Inbuilt cadence sensor
- Integrated gyroscope
- IAV Cycling Dynamics supported

Weight:
- Without pedal bodies: 99 g per side (including battery)
- With Shimano PD-R8000 pedal bodies: 157 g per side (including battery)

Design & Build:
- Adapter material: Aerospace-grade aluminum alloy
- Waterproof rating: IP67
- Q-Factor:

+64 mm with PD-R7000, R550, R540
+65 mm with PD-R8000, 6800

Connectivity:
- Wireless: Bluetooth v4.0 & ANT+ (PWR profile – CT + PO)
- Pairs with most cycling computers and apps

Battery & Charging:
- Type: Rechargeable lithium battery
- Battery life: Minimum 50 hours per charge

Compatibility:
- Bike type: Road bikes
- Pedal body compatibility: Shimano SPD-SL (PD-R8000, PD-R7000, PD-6800, PD-R550, PD-R540)

Made in: Italy
Warranty: 2 years

What’s Included in the Assioma DUO-Shi Box

- Left power sensor with adapter for Shimano SPD-SL pedal bodies*
- Right power sensor with adapter for Shimano SPD-SL pedal bodies*
- Battery charger with international plug adapters (EU, US, UK, AU)
- Two 2-meter micro-USB to USB charging cables with magnetic connectors
- Installation kit: Hex key and 4 washers
- Assioma general user manual
- Assioma DUO-Shi specific user manual

*Compatible with Shimano models: PD-R8000, PD-R7000, PD-6800, PD-R550, and PD-R540.

FAQs

1. What exactly is the Favero Assioma DUO‑SHI?
It’s not a complete pedal—it’s a pair of power-equipped spindles that you swap into your Shimano SPD‑SL pedal bodies. Once installed, you’ve got a dual‑sided power meter setup that measures power from both legs.

2. What Shimano pedals work with the DUO‑SHI?
You can drop them into most Shimano road pedals—Ultegra PD‑R8000, PD‑R7000/6800, PD‑R550, PD‑R540—all compatible. Dura‑Ace spindle users, though? Sorry—not a match.

3. How accurate is the power data?
Seriously spot-on—±1% accuracy thanks to Favero’s IAV (Instantaneous Angular Velocity) tech. It holds true even in odd conditions, like using oval chainrings or sprinting hard.

4. How much does it cost to install?
You just swap out the stock spindles—takes under 10 minutes with the right tools. It's way simpler than buying whole new pedals, and you'll save about $100–300 compared to full pedal systems.

5. Is the Q‑factor wider? Will I even notice?
Yes—it adds roughly 10–11 mm, moving your feet out to about 64–65 mm Q‑factor instead of the usual 54 mm. Some riders felt it at first, but most say you adapt after a few rides—and some even prefer it.

6. Can these take a beating?
Absolutely. They’re durable, waterproof (IP67), and weatherproof. The resin-protected sensors stand up fine to shocks, rain, and everyday riding conditions.

7. How long is the battery life—and how do you charge it?
Each spindle lasts about 50 hours per charge, rechargeable via magnetic USB. No need to mess with ports and seals—just click and plug.

8. Does it include cadence and advanced metrics?
Yep! You get cadence, gyroscope-powered IAV Cycling Dynamics (like Power Phase and Torque Effectiveness), thanks to built-in sensors in each spindle.

9. Is it ANT+ and Bluetooth compatible?
You bet. It connects via ANT+ (PWR profile) and Bluetooth 4.0, so it's ready for Garmin, Wahoo, Zwift, TrainRoad—you name it.

10. Who’s the DUO‑SHI made for?
It’s perfect for Shimano-road riders who already own compatible pedal bodies and want dual-sided power without splurging on full pedals. You keep your trusted pedals, get rich power data, and save a bundle.

Favero Assioma DUO-Shi Power Meter for Shimano Pedals

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