SRAM RED eTap Rear Derailleur – 11-Speed Short Cage Black A2. The SRAM RED eTap rear derailleur wirelessly executes shifts the instant you demand. Its easy to set up clean in appearance and delightfully uncomplicated. Mechanical necessities such as a carbon pulley cage ceramic pulley bearings and anodized alloy artfully blend with proprietary electronic advancements to deliver a shifting wonder.

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