SRAM RED AXS POWERMETER 56/43DM w/RED FD AXS 2-POS BLACKPowermeter Kit with included Red AXS 2 position front derailluer 8 bolt direct mount compatibility only to new RED and Force eTap AXS cranks. Not reverse compatible with prior 8 bolt cranks Power meter is fully integrated into the chainring set for lighter weight AXS enabled for easy monitoring and firmware upgrades X Range gearing technology gives you more range and a smoother gear progression, so you`re always in the right gear Power readings are