SRM PM9 1.2.1 - App Store

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About SRM PM9

Our 9th generation Spider PowerMeter takes our proven formula and updates it with modern features. The result is a PowerMeter that is easier to use, even more accurate, better to repair and has improved connectivity....

Our 9th generation Spider PowerMeter takes our proven formula and updates it with modern features. The result is a PowerMeter that is easier to use, even more accurate, better to repair and has improved connectivity. Thanks to a combination of angle and torque measurement, the PM9 is now able to measure with higher accuracy in very low cadence situations and not round chainrings do no longer have an impact on the recorded data. The integrated temperature sensor allows for maximum accuracy in changing conditions. Users are now able to show L&R balance, as well as combined Pedal smoothness. PowerMeter 9 comes with many usability improvements. First of all is the Magnet-less cadence mode, which allows you to use the PowerMeter without any cadence magnet. PowerMeter 9 can be used with ANT+ and Bluetooth LE. It connects to pretty much any head unit and comes with a mobile App. The App gives you access to live torque data, battery status information, firmware updates and much more. Features: . Magnet-less cadence . Left / Right Balance . Combined Pedal smoothness . Not round chainrings compatible . Automatic temperature compensation with sensor . Rechargeable via magnetic charger . 100 h battery runtime between charges . Compatible with Head-Units using ANT+(TM) and Bluetooth(R) . Zwift(TM) compatible

Version History Removed references to old libraries 1.2.1 10/19/2025 - Updated all libraries to latest version - Fixed Fixed minor bugs 1.2.0 09/19/2025 - Fixed crash when app try to read not available characteristics - Fixed crash on DFU procedure - Embedded new FW version 1.5.0 1.1.0 05/07/2024 - Improved reading of manufacturer data - Improved synchronisation of PM9 RTC with the phone - Fixed realtime torque chart notification 1.0.9 03/04/2024 Improved DFU procedure 1.0.8 05/26/2023 - Some new translations - Embedded new FW version 1.3.6 1.0.7 05/19/2023 -Embedded new FW 1.3.1 1.0.6 01/16/2023 Added: - Embedded new FW version 1.2.3 Changed: - Removed auto zero offset switch. - Forcing disable automatic zero offset by protocol. Fixed: - Clean firmware update procedure. 1.0.5 11/21/2022 • Possibility to skip firmware upgrade. • Automatic zero offset (in advanced mode). • New embedded PowerMeter9 firmware 1.2.2. 1.0.4 11/03/2022 - Fixed a problem that prevents user to correctly sends diagnostic emails 1.0.2 12/06/2021 1.0.0 09/15/2021

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Previous Versions

Here you can find the changelog of SRM PM9 since it was posted on our website on 2024-10-28 17:10:17. The latest version is 1.2.1 and it was updated on 2026-06-25 19:23:36. See below the changes in each version.

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