Favero Assioma PRO MX: bringing meaningful power data to gravel riding

Gravel riding sits in an interesting place. It’s part exploration, part endurance challenge, and increasingly, part performance discipline. Riders are pushing further, racing harder, and training with more intent. When it comes to data, many are still relying on feel rather than something measurable.

That’s where power comes in.

For years, power meters have been a staple on the road, offering a clear, objective way to track effort, pace rides and monitor progression. On gravel, adoption has been slower, not because the benefits aren’t there, but because the demands of the terrain are different. Conditions are harsher, surfaces are inconsistent, and equipment needs to be more robust.

The Favero Assioma PRO MX is designed with exactly that in mind, bringing accurate, reliable power measurement to gravel riding in a way that feels practical rather than overcomplicated.

A growing ecosystem from Favero

What makes the PRO MX particularly well suited to gravel isn’t just that it measures power, but how it does it.

At its core is Favero’s patented spindle-based design. Rather than placing sensitive components externally, everything, including the strain gauges that measure force, along with the battery and electronics, is housed within a sealed stainless-steel spindle.

Gravel riding exposes equipment to dust, water, vibration and repeated impacts. By keeping the critical components protected inside the spindle, the system maintains consistent accuracy where other designs can be more vulnerable. The result is stable, reliable data collection, even when conditions deteriorate.

It also has a practical upside. With no electronics in the pedal body itself, that outer structure can be replaced using standard tools if it becomes worn, a useful consideration for riders logging big miles across mixed terrain.

On bike feel and real-world usability

On the bike, the PRO MX keeps things clean and unobtrusive. At just over 195g per pedal, with a low 11.2mm stack height and a 53mm Q-factor, it feels much like a standard gravel pedal setup.

The SPD®-compatible system is designed for smooth engagement, with a pedal body that sheds mud effectively.

Looking beyond raw wattage

Where things get more interesting is when you start to look beyond raw wattage.

Power, in its simplest form, tells you how hard you’re working. But on gravel, where cadence fluctuates and positioning changes constantly, that only tells part of the story. The Assioma PRO MX builds on this with a range of advanced metrics that give a more complete picture of how that power is being produced.

One of the most useful is PCO (Platform Centre Offset). Rather than focusing purely on output, PCO shows how force is distributed across the pedal platform. On long gravel rides - especially when fatigue sets in - small inefficiencies can creep in. Cleat positioning or changes in pedalling style can all affect how effectively power is transferred.

PCO brings those details into view. It highlights where force is being applied, helping riders refine their setup and technique in a way that’s difficult to assess otherwise. Over time, that can lead to improved efficiency and potentially reduce the risk of overuse injuries.

Alongside that, metrics like Power Phase and Rider Position add further context. Knowing when and where you’re generating torque through the pedal stroke can help smooth out effort on long climbs, while rider position tracking gives insight into how often you’re seated or standing, which can vary so often off-road due to terrain, weather or effort.

Consistency across changing terrain

All of this is underpinned by Favero’s IAV Power System, which is designed to maintain accuracy and consistency of power readings.

That’s particularly relevant for gravel riding, where surfaces and gradients rarely allow for a steady rhythm. Instead of smoothing over those variations, the system accounts for them ensuring that the data remains dependable.

Battery life that keeps up with big rides

Battery life is another area where the PRO MX quietly stands out. With up to 160 hours of use on a single charge, it’s well suited to long-distance riding, multi-day trips or simply riders who don’t want to think about charging every few rides.

When it does run low, a quick 15-minute charge can deliver up to 15 hours of riding easily topped up from a standard USB-C power source.

From common pain points to real gains

For gravel riders, the “pain points” around power meters have often been the same: concerns over durability, the hassle of installation, and whether the data is actually useful in such a variable environment.

The Assioma PRO MX addresses those by being robust enough for the terrain, simple to live with, and detailed in its data to offer genuine insight to riders.

A smarter way to ride gravel

And that’s perhaps the key point. This isn’t about turning every gravel ride into a structured interval session. It’s about giving riders the option to understand their effort more clearly, to pace long days more effectively, and to track progression over time, all without losing the essence of what makes gravel riding appealing in the first place.

As the discipline continues to evolve, that balance between adventure and performance is becoming more relevant. Tools like the Assioma PRO MX don’t change the nature of gravel riding they simply add another layer to it.

Pricing

• Assioma PRO MX-2 (dual-sided): £599
• Assioma PRO MX-1 (single-sided): £399
• Assioma PRO MX-UP (upgrade pedal): £389

For full specifications and product details, visit the Favero home page here