not bad +12°. but what a price it enve.
grazie

wow great weight.  What size is the frame?  besides the red group, what wheels do you fit?  mine in size xl mounted on force and with 1500gm wheels weighs 8.2kg

wow beautyfull

I have two, 12-speed Micro Spline 10-50s on different bikes.   I wrote ZTTO for a long time asking when they were going to sell this lightweight version with MS splines.   I have been using my first one for about 1.5 years and it has held up great.  I purchased the second one about 6 months ago, and it is on a bike I don't ride as often.   (My first cassette was probably from the first batch they manufactured. - They wrote me that I was the first person they were notifying that they were now available. so I purchased one right away.)

As a side note, 3 of my other 12 speed cassettes are XT micro-spline.  I can't tell any difference in how the ZTTO shifts versus the XTs.    I am also using The Wheel Top EDS OX on 3 of the 4 bike I run 12 speed.  (Soon to be all 4)
I have 7 rear wheels with 12 speed cassettes.  3 wheels run a XT cassette, 2 are ZTTO the cassette you asked about, and 2 have ZTTOs slightly heavier version.  2 bikes are Super-Boost, and the other 2 are boost.

well I'm pleased, you are an excellent tester!
I'm thinking about what gear to buy, I saw that Shimano makes 10-51 while the Ztto ones are 10-50 or 10-52. if you notice the difference in the teeth it is all on the last 3 largest sprockets. shimano gradually increases the number of teeth but until the penultimate 42 they are both the same then it jumps to 50 or 52.
I would prefer 10-52 to have a greater range of gears but the fact that between 42 and 52 there is a jump of 10 teeth stops me, isn't that too much?

Not exactly this but MTB cassettes have been a hit or miss for me including 11 speed ones. I think the cog spacing isn't consistent and considering how sensitive 12s is the indexing can be major pain to near impossible. The only Aliexpress cassettes that worked well were (for me) road spec small cassettes in the range of 11-30/32. The Shimano XT 8100 ms 10-51 costs less than this and weighs bit more at 460 grams but I think that is a way better option. On my 11s I eventually went with Deore M5100 cassette and for 12s I got the SLX M7100 and life's good again.

yes actually your thought is not wrong, with less money and little extra weight I get an xt cassette which will certainly be perfect, I wanted it to upgrade from the deore cassette which weighs 600gm
as a change I will mount an xtr

good morning I would like to know if anyone has experience with this bar.  I would like a license plate on my Orbea Oiz.  The sturdiness scares me a bit, I weigh 90kg and I do sometimes very technical and disastrous routes, I wouldn't want it to be fragile.  can you give me some advice?  Thank you.

good morning everyone, on Saturday I tried and tested the 4 piston zrace brakes, I mounted them with your zrace discs.  on the first outing they seemed good, it took me a while to find the right grip then everything was ok.  braking is good, they have a lot of power and don't seem to suffer from overheating problems.  I tested them with the pads supplied in the kit which in my opinion seem metallic.  now I want to try them with a pair of shimano resin pads, which have always been my favorites for feeling, in my opinion they improve a lot.  I will update you soon.