SRAM has just announced the introduction of a downhill-specific drivetrain system.  The X01 DH group will consist of a carbon single ring crankset (30, 32, 34, 36 or 38 tooth chainring), 7-speed trigger shifter and rear derailleur, and 10-24 tooth 7-speed cogset.  The system will use the existing narrow XX1 11-speed chain.  A less expensive option will be a 10-speed version of the rear derailleur that will work with existing 10-speed cogsets and SRAM shifters.

SRAM says the X01 DH components will be on the market in April.

 

 

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Carbon single ring crankset

 

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7-speed trigger shifter, rear derailleur and drive body

 

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10 speed shifters- Gripshift and trigger options

 

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10 speed rear derailleur