RED Aero X-Sync Chainring E1 – SRAM RED Aero X-Sync Direct Mount Chainring –
SRAM RED Aero X-Sync Direct Mount Chainring – 50t, 12-Speed, 8-Bolt Direct Mount, 6.5mm Offet, Black, E1. MPN: 00.6218.048.001 – SRAM – RED Aero X-Sync Chainring E1 – Direct Mount Chainrings. Laser-etched chainring finish is more durable than previous version.