Has anyone seen a SRAM Force AXS DUB power meter fail like this?
Has anyone seen a SRAM Force AXS DUB power meter fail like this?
This is on a brand-new Canyon bike.
I've already tried:
- Fresh lithium AAA battery
- Firmware update (latest version)
- Multiple zero offset calibrations
- Removing the battery for several hours and reinstalling it
The power meter calibrates successfully every time and cadence readings appear correct.
Initially it was massively under-reading. Normal riding was showing between 10 - 30 watts and efforts that would normally be around 400W on my previous Quarq power meters were only showing about 120W.
After removing the battery for several hours, the behaviour became even stranger.
The power meter now behaves like this:
- When I start riding and get up to speed reports around 10-30W
- When I settle into a steady effort, the power gradually climbs despite my effort remaining constant
- During very light pedalling it can end up hovering around 700W
The reported power bears no relationship whatsoever to actual effort.
For context, I've used both Quarq spider-based power meters and a previous SRAM AXS spindle power meter for years. Those systems agreed closely with each other and my typical L/R balance is around 48% / 52%.
At this point it feels like the torque measurement is completely unstable rather than a calibration issue.
Has anyone experienced similar symptoms, and if so was it ultimately a warranty replacement or is there anything else worth trying before I contact SRAM?
Thanks.