reviewed by:
acidlungThis cassette (11-28) shifts as well as the Dura-Ace cassette (11-24) it replaced. Now that said, I did replace the Shimano chain at the same time with a KMX X9.93. But for the cost, you cannot beat this cassette.
I've put it through the paces on flats, downhills, and shifting under pressure while pedaling uphill. I have all Ultegra drivetrain (other than the original cassette), if that matters.
It's definitely heavier than the Dura-Ace cassette, but not by much.