SRAM RED AXS 2x Power Meter Chainring Kit - 54/41t, 2x12-Speed, 8-Bolt, Direct Mount, Black/Silver, E1 met-helmets J-Kit Technology: For some frames

J-Kit Technology: For some frames with internal routing

Convert or replace your existing Hydra mountain freehub body with this complete XD kit

Roller bearing clutch and parallelogram design combine to minimize chain bounce

RockShox MegNeg Upgrade Kit Rear Shock Part UPC: 710845831119

Industry Nine 1/1 Classic Rear Hub Rear Hub UPC: 810098980487

SRAM RED AXS 2x Power Meter Chainring Kit - 54/41t, 2x12-Speed, 8-Bolt, Direct Mount, Black/Silver, E1 met-helmets J-Kit Technology: For some framesIt's the ultimate in integrated power measurement. The RED AXS power meter kit adds Quarq technology to SRAM's one piece chainrings for the lightest, stiffest, and most accurate power package available. 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 our most durable chainrings ever, it's an unbeatable combination. X Range gearing technology