Favero Assioma Pro RS Firmware Doubles Battery to 160 Hours

Favero just pushed a firmware update to its Assioma Pro RS and Pro MX power meter pedals that more than doubles battery life. We're talking a jump from 60 hours to 160 hours of recorded ride time, no hardware swap required. That's a 167% increase delivered silently over the air, and it changes the competitive picture for cycling power meters in 2026.

Battery Life: How the Numbers Stack Up

The Garmin Rally RS200 and RK200 pedals have sat at roughly 90 hours of battery life, which was a comfortable lead over the old Assioma Pro RS spec of 60 hours. Favero's update flips that entirely. At 160 hours, the Pro RS now runs nearly 78% longer than the Rally on a single charge. For context, a competitive age-group triathlete doing 10 to 15 hours of cycling per week won't need to charge these pedals for two to three months. That's a real-world difference you feel during a heavy training block, not just a spec-sheet win.

The Pro MX, Favero's dual-sided SPD pedal aimed at mountain bikers and gravel riders, gets the same treatment. Both pedals use CR2032-style coin cells, so the efficiency gains here are purely firmware-driven power management improvements. No new battery chemistry, no hardware revision. Favero squeezed more life out of the same physical components, which is worth respecting from an engineering standpoint.

Sensor Tech Behind the Power Numbers

It's worth being clear about what these pedals actually measure. The Assioma Pro RS uses strain gauges bonded to the pedal axle to detect mechanical deformation under load. That deformation translates to torque, combined with cadence from an accelerometer, and the pedal outputs power in watts via ANT+ and Bluetooth simultaneously. There's no optical PPG sensor involved, no GPS, no barometric altimeter. It's a purpose-built power measurement tool, and that focus is why the accuracy holds at plus or minus 1% according to Favero's published specs.

The dual-sided Pro MX captures both left and right independently, giving you left-right balance data that a single-sided system like the older Assioma Duo-Shi cannot provide. If you're a triathlete or road cyclist who uses power for pacing on race day, left-right data also helps identify asymmetries that a coach can address in training. Garmin's Rally pedals offer the same dual-sided capability, and both pair cleanly with Garmin Edge computers, Wahoo Elemnt units, and Coros watches with cycling power support.

Real Use Cases for Triathletes and Cyclists

For Ironman and 70.3 athletes who travel to races, battery anxiety on the bike leg is a genuine concern. A 40-minute swim before a 5-plus-hour ride means your equipment needs to be fully operational at the start of a long day. With 160 hours of life, you could do two full Ironman training weeks and a race without touching the battery. Compare that to a power meter like the Wahoo Speedplay Powrlink Zero, which sits around 80 hours, and the Pro RS pulls further ahead.

Gravel and ultra-endurance cyclists will notice this even more. A bikepacking athlete doing 12 to 15 hour days needs power data that doesn't quit before they do. The old 60-hour ceiling was a legitimate limitation for multi-day events. At 160 hours, it's no longer a conversation worth having. Favero didn't change the price to deliver this, which currently sits around 399 euros for the Pro RS single-sided and 599 euros dual-sided.

What's Still Missing

Favero still doesn't offer a native app experience that rivals Garmin's ecosystem integration. Pairing is straightforward, but firmware updates require the Favero app, and the app itself is functional rather than polished. There's also no cycling dynamics data comparable to what Garmin's Rally pedals output, things like platform center offset and power phase. For most athletes that data is noise anyway, but dedicated bike fitters and coaches working at that level of detail will note the gap. The Pro RS also remains Look KEO compatible only, so if you ride Shimano SPD-SL, you need the Pro MX or a different solution entirely.

Favero has delivered one of the most meaningful firmware updates in cycling tech this year, and they did it for existing users at zero cost. The Assioma Pro RS now beats the Garmin Rally on battery by a significant margin, holds its own on accuracy, and undercuts on price. If you're already on Look KEO cleats and want dual ANT+ and Bluetooth output, this is the pedal to buy in 2026. The Rally is still a strong choice if you need Garmin ecosystem depth, but on battery life alone, Favero wins cleanly.