Chris Ringelwrote a review of SRAM NX PG-1130 11-Speed Cassette on February 9, 2017
Familiarity: I gave it as a gift but have feedback to share
This was put on my sisters Surly Krampus. Here is what she says:
"If you're wanting to convert your drivetrain to a 1x11, this is your cassette. An 11 speed which fits onto your standard freehub body. It's a great cassette for the price, and it's black! It looks great and shifts smoothly."