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How Does SRAM Red ETap Compare to Shimano Di2?

We compare SRAM's relatively new virtually wireless system to Shimano's Di2, which has been on the market for eight years.

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With the introduction of Red E Tap for triathlon at this year’s Ironman World Championship, SRAM entered the world of electronic shifting. We compare their virtually wireless system to Shimano’s Di2, which has been on the market for eight years.