When SRAM first introduced its groundbreaking 10-speed Red component group, the heart of the industry-shaking design was 1:1 Exact Actuation technology. In ordinary terms, this means that with each shift the derailleur pulls the same exact length of cable, regardless of what gear you're in. 1:1 is simple to set up, it stays in adjustment longer, and it provides laser-accurate shifting. The Red Aero Glide Rear Derailleur benefits more directly from the lessons learned over the life of first generation 1:1 than if SRAM were to start from scratch.
Exact Actuation shifting provides fast, accurate shifts
More clearance with 28t cassettes thanks to a longer B-knuckle
New silent shifting with optimized AeroGlide Pulleys, ceramic bearings
New spring-fixed barrel adjuster
New chain pulley cage adds precise chain management
Titanium pinch bolt keeps a low profile while minimizing weight
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