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SRAM XX1 Eagle XG-1299 Cassette 12 Speed 10-50T Rainbow model-c3ultegra 5" 140mm 15x110mm Boost Thru-AxleThe SRAM XX1 Eagle AXS XG 1299 is designed to pair with the XX1 Eagle AXS drivetrain system. The 10 50t 12 speed cassette offers an optimal 500% gear range with significant weight savings in a 1x system. The X DOME Eagle cassette has no peer. It buried the last dangling shred of an argument in favor of a mountain bike front derailleur. And now, its 10 50 tooth gear range has open the door for an entire ecosystem of Eagle groupsets. Designed for use