SRAM PG-980 9 Speed Cassette 2013
Reliable and durable cassette technology. SRAM's cassette performance is optimized through tooth profile and shift ramp design for quick and positive index shifting.
Considering the weight difference between this and the 990 is pretty insignificant, this is pretty much the same cassette for a lot less. When it's on closeout, it's a no-brainer. ZERO issues with these, light, crisp shifting, cool black spider and strong. Unlike the 990, I have never bent the cogs on this cassette.