- Full X-Sync tooth profile for best-ever inboard and outboard shifting performance under load - Optimized 7-speed, 10-24t gear steps for DH - T-Type chain compatibility only - Setup Cog for fool-proof set up - Utilizes well accepted and broadly available XD driver body, or all-new gravity specific XD SLIM driver body for more symmetric spoke bracing angles on narrow 148mm rear ends. - eMTB approved