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The introduction of the SRAM Red eTap Electric Road Kit will change your outlook on what an electronic group can achieve. Red eTap features clean wireless 11-speed shifting thanks to eTap paddle shift logic that virtually eliminates mistaking upshifts for downshifts, while keeping shifting precise, fast, and easy. The SRAM RED eTap rear derailleur executes shifts the instant you demand it, with military precision. Being wireless, it's easy to set up, clean in appearance and delightfully uncomplicated. SRAM Yaw technology changed front shifting forever, eliminating the need for trim. The RED eTap front derailleur makes a good thing better by executing front shifts confidently and quickly over SRAM's proprietary wireless communication protocol. The eTap shifter optimizes Yaw adjustments as needed throughout the shift range with no need for rider input. The eTap batteries are literally a snap to remove and charge. Just flip the tool-free battery latch up and slide the battery up and out of the derailleur. Then snap the battery into the USB powered charger and connect the charger to any USB power source or A/C USB adaptor. A full charge takes just 45 minutes to complete. Battery life is 60 hours before you need to recharge.