The new X7 10-speed rear derailleur drops carbon cages down to a new low...in a good way.Trickle down technology is a wonderful thing, and given that XX was only introduce last year, the pace of change is indeed a good, good thing for consumers.
SRAM Exact Actuation for precise and dependable 10 speed performance
3K carbon cage
239 grams (10 speed Carbon Long Cage)
36t Cassette compatibility
3 cage lengths available - Short for DH, Medium for 2X10 and Long for 3X10