What PowerLock do I use for my Flattop 12-speed chain? August 09, 2021 21:58 Updated Use only the SRAM Flattop 12-speed PowerLock for Flattop 12-speed road chains. Related articles Can I reuse the Flattop PowerLock after I have removed it? What Eagle AXS components are compatible with SRAM XPLR eTap AXS? Can I use an Eagle chain with the XPLR direct mount chainring? What size cassettes work with the XPLR rear derailleur? How do I size a chain for a 1x SRAM Eagle AXS™ drivetrain? Comments 0 comments Article is closed for comments.