Will SRAM RED eTap 2x11 derailleurs work with 10-speed drivetrains? November 20, 2019 17:47 Updated No, SRAM RED eTap 2x11 shifters are 11-speed (22) compatible only. Related articles Can I assemble a SRAM RED eTap 2x11 system with no front derailleur to create a 1x drivetrain? Will the system still work? Will SRAM RED eTap 2x11 work with a 36 or 42 tooth cassette? Can I use a non-SRAM chain with SRAM RED eTap® 2x11? Are there new cranks, rings, cassettes, and chains that are made for SRAM RED eTap 2x11? Are there frame fit specifications required for SRAM Red eTap 2x11?