Wolf Tooth GC 42t Cassette Cog April 14, 2015April 14, 2015 by Tom Collier The Wolf Tooth GC 42 cassette cog boosts the gear range of a 1x10 drivetrain at a fraction of the cost of a new 1x11 setup.
SRAM X9, 10-Speed Drivetrain November 2, 2012September 28, 2011 by Jeff Brines SRAM's X9 10-Speed Drivetrain delivers a ton of bang for the buck.