Cassette 12speed with good shifting performance

[DP68SL8]

Any tips for a good light 12speed road cassette? Currently running the very light ZTTO 11-34 with a dura-ace di2 groupsets. Shifting in the smaller coggs is a bit rough, one gear barely shifts Up, an other barely down...
Considering switching to the wheeltop groupsets, but I'd like to stay with the light Dura Ace...

[kbernstein]

this guy seems to know what he's talking about. i got the goldix recently but still waiting for the frame to test it

[crazyravr]

Ultegra......... and be done with it.

[jonathanf2]

Swap out the chain. Any roughness on the ZTTO cassette is most likely due to the Shimano chain profile. A chain with a more neutral chain profile like a KMC X12 should shift much better on third party cassettes. Either that or just use Shimano cassettes with Shimano chains.