The new Eagle Transmissions are one-by 12-speed systems, but the parts will not work with other Eagle components. All three tiers work with the majority of newer frames - if your bike is compatible with a Universal Derailleur Hanger (UDH), it will work with the Eagle Transmission. It costs less than previous AXS drivetrains as a full system. The sticker shock may mitigate some buyers, but it’s worth a second appraisal. The Eagle Transmissions comes in three tiers - the base level XO, which I tested, starts at $1,299 the midlevel XX starts at $1,599 and the premium carbon XX SL designed for XC racing, which will set you back at least $2,199. No more worrying about minor crashes or rocks hitting the rear derailleur and screwing up the shifting for the rest of the ride. Without a derailleur hanger, limit or B-tension adjustments, or cables, shifting under load was much easier, the installation was simple, and most importantly, it was incredibly burly. SRAM cleverly describes the new Eagle Transmissions as a “seismic shift on what it means to shift a mountain bike.” While that sounds a lot like hyperbole, I think it’s a giant leap forward - perhaps the biggest we’ve seen in years, on par with one-by drivetrains and electric shifting, both of which SRAM spearheaded. Most importantly, it proved incredibly robust, something unattainable until now.Ĭheck Price at SRAM How Big Is This Update? It was simple to install and required no adjustments or maintenance beyond charging batteries. In short: The SRAM XO Eagle Transmission removes almost every negative of rear derailleurs. And I put one month and 300 miles on the new SRAM XO Eagle Transmission. They call the system a “transmission” instead of a “drivetrain” because it is integrated and simple, seamlessly connecting to AXS shifters, derailleur, and brakes.įor context, I’ve been riding electronic AXS components since they launched 4 years ago and one-by groupsets for almost a decade, giving me a direct comparison between the new and the old. SRAM formally announced the Eagle Transmission on March 21, and I was fortunate to get a demo bike about a week later to test for this review. As a lifelong cyclist and a devout cynic of the derailleur hanger (I’ve bent and broken three in the last 2 years), this was Mozart-level music to my ears. By early winter, photos started to leak online. It was substantiated a week later by a bike tester close to the brand. I first heard a rumor about the new direct mount derailleur last fall through a pro rider. But the folks at SRAM, bless their dear hearts, are not very good at keeping secrets. Ditching industry standards isn’t something that can be done quickly and is usually done discreetly.
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