SRAM Force Power Meter KIT Spider DM - D2Its the ultimate in integrated power measurement. The SRAM Force AXS power meter chainring kit adds Quarq technology to this one piece 2x chainring kit for a light, stiff, and accurate power package. A 13 tooth delta on all chainring pairs ensures precise shifting for any setup, as well as a less dramatic change in cadence during front shifts. Combined with SRAM's most durable chainrings yet, its an unbeatable combination. X Range gearing technology