New A2 version of the highest performing cassette from SRAM. The XG-1190 can be used with any SRAM group as well as current model Shimano or Campagnolo Cassettes.
The20120 bulk of the cogs machined in one piece of tool-grade steel for low weight, no cog flex and high durability. Largest cog is aluminum.
I am a big fan of SRAM cassettes even though I run Dura Ace on my bikes. It is light, and most of all the design allows for easy removal and replacement due to the block rather than individual cogs. I also like that the 11/28 comes with a 16 tooth cog which to me is crucial for cruising along.