If you’re searching for the best MTB power meter pedals or a reliable SPD power meter for gravel, the Favero Assioma PRO MX-2 sits at the top of every serious cyclist’s gear list. This is a true off-road power meter built for mountain biking, gravel racing, CX, and long endurance rides. Unlike crank-based units, the MX-2 gives dual-sided power data with exceptional ±1% accuracy — something riders constantly highlight in Favero Assioma PRO MX-2 reviews.
Built with Favero’s sealed spindle technology and rugged aluminum pedal bodies, the PRO MX-2 thrives in mud, rain, rock-garden hits, and harsh terrain. It installs like normal SPD pedals, making it one of the most versatile dual-sided SPD MTB power meters in 2025.
Who It’s For
This power meter is ideal for:
XC racers needing accurate MTB power meter data on climbs & intervals
Gravel riders wanting the best SPD power meter pedals for long adventures
Cyclists comparing Assioma MX-2 vs crank power meters for off-road use
Riders upgrading from single-sided meters to true dual-leg analysis
Bikepackers needing long battery life (60+ hours) and full weather sealing
Anyone who wants fast installation & the ability to swap between bikes easily
Key Benefits
Dual-Sided Power Measurement for MTB & Gravel: Get true left/right data — essential for training balance, analyzing pedaling technique, and climbing efficiently.
±1% Accuracy Even Off-Road: Favero’s IAV Power system ensures consistent readings even on rough, low-cadence MTB trails — a big reason it’s considered one of the best power meters for XC riders.
Perfect SPD Compatibility: Use your preferred SPD shoes/cleats. Works with Shimano SH51/56 cleats — ideal for MTB and gravel.
Super Easy Installation: Attach like normal SPD pedals. Perfect for riders Googling “how to install Assioma MX-2”.
Modular & Future-Proof: Swap pedal bodies (road ↔ gravel ↔ MTB) while keeping the same power spindle.
Rugged for Off-Road Use: IP67 sealing makes it one of the most durable SPD power meter pedals for mountain biking.
Long Battery Life: 60+ hours per charge — perfect for bikepacking and multi-day gravel events.
Features
Dual-sided power measurement — highly rated in MX-2 vs MX-1 comparison
SPD-compatible MTB pedal bodies
±1% accuracy (even with oval chainrings)
ANT+ & Bluetooth
Left/right balance, cadence, torque effectiveness, power phase
Hardened steel spindle for MTB impacts
IP67 waterproof sealing
60h rechargeable battery life
Weight: ~195g per pedal
Ideal for gravel racing, XC, CX, marathon MTB, and endurance training
Real-World Use Cases
MTB Riders (XC & Trail): Rock gardens, roots, and low-cadence climbs? The Assioma PRO MX-2 remains extremely accurate — outperforming most crank power meters for MTB.
Gravel Riders: Riders say this is the best power meter for gravel bikes thanks to its SPD compatibility, battery life, and stable power readings on bumpy terrain.
Training With Dual-Sided Data: Fix left/right imbalances, improve climbing efficiency, and track progress better than any single-sided pedal.
If the pedal won’t connect, rescan via Bluetooth/ANT+
Re-enter crank length after switching bikes
Rinse and dry after muddy rides (electronics are fully sealed)
Use magnetic charger only — avoid damaging contacts
If power numbers look off → recalibrate via bike computer or app
Technical Specifications
Power: Dual-sided
Accuracy: ±1%
Battery: 60h rechargeable
Connectivity: ANT+, Bluetooth
Cleats: SPD / SH51 / SH56
Waterproof Rating: IP67
Weight: ~195g per pedal
Pedal Body: 6061-T6 aluminum
Axle: Hardened steel
FAQs
1. Is the Favero Assioma PRO MX-2 the best MTB power meter? Yes — it’s widely considered the most accurate and durable MTB SPD power meter for XC, gravel, and cyclocross riders.
2. How accurate is the MX-2 off-road? It maintains ±1% accuracy even on rough terrain thanks to IAV Power technology.
3. What’s the difference between MX-2 and MX-1? MX-2 is dual-sided; MX-1 is single-sided. MX-2 gives more detailed data for training.
4. Is MX-2 better than crank power meters for MTB? Yes — crank power meters often fail on bumpy terrain. Pedal-based sensors are more consistent off-road.
5. Do the Assioma MX-2 pedals work with SPD cleats? Yes — they work with Shimano SPD cleats like SH51 and SH56.
6. How long does the MX-2 battery last? 60+ hours per charge — ideal for adventure rides and races.
7. Can the Favero Assioma PRO MX-2 be used with gravel, XC, and cyclocross bikes? Yes. The PRO MX-2 is designed specifically for off-road disciplines like gravel racing, XC, marathon MTB, and cyclocross. Its SPD platform and rugged pedal body make it one of the most versatile SPD power meter pedals for mixed-terrain riding.
8. How does the Assioma PRO MX-2 compare to Garmin Rally XC200? Riders often find the MX-2 more durable in muddy conditions and more accurate at low cadences on steep climbs. Garmin XC200 offers more ecosystem features, but the MX-2 wins in value, off-road durability, and long-term accuracy according to many rider reviews.
9. Is the Assioma PRO MX-2 compatible with oval chainrings? Yes. Unlike many crank-based power meters, the MX-2’s IAV (Instant Angular Velocity) system maintains ±1% power accuracy even with oval chainrings, which is a major advantage for MTB riders who prefer oval rings for climbing and traction.
10. Do I need to calibrate the Assioma MX-2 before each ride? It’s recommended but not mandatory. A quick zero-offset calibration ensures the most accurate power readings—especially if the temperature has changed or if you’ve recently switched the pedals to a different bike.
11. Can I use the MX-2 with Zwift, Garmin, Wahoo, or Hammerhead computers? Yes. The PRO MX-2 is fully compatible with Zwift, Wahoo, Garmin, Hammerhead Karoo, and any device that supports ANT+ or Bluetooth power meter connections, making it perfect for both indoor trainers and outdoor rides.
Favero Assioma PRO MX-2 — Dual-Sided SPD MTB Power Meter Pedals (Best Power Meter for Gravel & XC Riders, 2025 Review)
