SRAM Rival AXS Wide Power Meter Left Crank Arm Spindle Upgrade Kit - 160mm DUB Spindle Interface BLK D1SRAM Rival AXS Wide Power Meter Left Crank Arm and Spindle Upgrade Kit 160mm DUB Spindle Interface Black D1. Power every ride with the SRAM Rival AXS Wide Power Meter Arm and Spindle Upgrade Kit. This power meter platform is entirely contained within the DUB spindle for clean integration that fits more bikes than ever. Its invisible technology that adds minimal weight and will help you get to the finish line faster and can be used to upgrade any eTap