Can I upgrade to the Rival power meter if I have a standard crankset, or do I have to buy a new crankset? The Rival power meter is part of the non-drive side assembly and is only offered as an upgrade kit for existing Rival 12-speed DUB cranksets. Read more in our article, Upgrade to Power On Rival Etap AXS. Or, visit the Rival AXS Power Meter Upgrade page and shop now. Related articles Is there a power meter option for Rival eTap AXS? Is the SRAM Rival power meter dual-broadcast? Rival AXS power meter section Do I need to calibrate my Rival power meter before I use it? What frame bottom bracket interface standards are Rival cranksets designed to work with?