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ultegra rx

  1. Components, Wrenching
    Outside of a small weight penalty, there really is no downside to the Shimano Ultegra RX rear derailleur. Photo courtesy Shimano/Eric Wynn What is it Taking a page from the mountain bike arena, but with a few drop bar tweaks, Shimano's Ultegra RX rear derailleur utilizes the company's Shadow...
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