Experience with ZTTO ULT (Steel Cogs, Alloy Spider) Cassette?

[RhubarbChrisP]

ZTTO sells a number of road cassettes, the most interesting option for me is their ULT series which uses all steel cogs that are on an alloy spider.

These come in 11-28T, 11-30T, 11-32T and 11-34T varieties.

 Weight is low but not insanely low, and if everything holds together nicely than durability is hopefully quite good.

These are not cheap however, so don't want to take the a risk and find out that they're incredibly creaky or high maintenance or something like that. Therefore wondering about everyone's experience with them.

It sounds like some people have had issues with the small bolts that connect the cogs to the spider coming loose? Has anyone had that experience? It also sounds like maybe in response they stopped using bolts and moved to rivets instead, although I haven't seen this in pictures.

[jonathanf2]

I have the ULT Goldix and ZTTO cassettes (the same). No issues with my screws going loose with any of my cassettes. Though I do ride in year-round ideal road conditions and rotate my bike usage (2 road, 1 gravel) to minimize wear-n-tear. I would avoid using Shimano chains which don't seem to shift well on these aftermarket cassettes. The issue being when shifting from the big cogs to the smaller cogs, Shimano chains are more prone to rubbing.  I switched both my road bikes to KMC X12 chains which seem to work better. Other chains might work fine as well. I highly recommend immersive chain waxing to prolong the longevity of the cassette as well.

[Bigbobby1482]

I have the slr gen 2 (only 1 aluminium cog). Have only about 1k km on it, but doesn't look worn at all. I'm using it with a Shimano chain and it shifts great. I did need to run a close b gap, in order for it to shift well.
Only thing is, my drive chain is a lot more noiser with this cassette, might be the Shimano chain.