Full bikes, where to find and how are they (Seraph or others)

[casper.f]

Ive been looking into a full bike like the Seraph TT-X80
https://www.seraphbikes.com/Newest-2X12S-Aero-Road-Bike-TT-X80-Wheeltop-24-Speed-Hydraulic-Di2-Groupset-Carbon-Wheelset-Complete-Bicycle-p6301637.html

At only 1200USD shipped to EU it seems like a steal. But i have some questions

    Build Quality:

        I expect cost-saving parts (saddle, tires, etc.), which are easy to replace. But how’s the actual assembly?

        Are critical steps done properly (greasing bearings, indexing gears, aligning brakes)? Or are there shortcuts that’ll bite me later?

    Geometry Limitations:

        Seraph’s complete bikes seem limited to smaller/aggressive frames. At 188cm, I’d need a ~580mm+ stack—does anyone know if they’ll build other frames (e.g., endurance models) as complete bikes?

        Alternatively, are there other reputable sellers offering similar complete builds at this price point?

[glepore]

They'll build any frame up complete, just email them and ask for a quote. Some limitations-ie they don't do powermeter cranksets, but they can do Shimano builds, or Wheeltop.

[Takiyaki]

I think if you are this particular about assembly & geometry it's probably worth piecing together the bike yourself. It sounds like you know what you want and need. Also worth looking into used bikes honestly.

[Serge_K]

the wheels & tyres are very likely to be shyte.
I also wouldnt ride a 42 wide bar ever again.
Other than that though, 50/34 & 170 isn't bad. It's a 30$ crankset, probably, will get the job done. 11-32 cassette isn't bad.
If you can get them to build you a bike with narrower bars, and maybe give you a discount if you dont buy the wheels, it could be a good deal.

On relaxed geometry frames, the chinese market is younger than the west, and they all want to ride SL8. Until TDF bikes have higher stacks, legit high stack bikes (a la Pinarello F) are going to remain very niche, I think.

[Sander2177]

The reliability of that Chinese groupset would be a ? for me.
I would request 105di2 myself
As if you have issues with the groupset getting support might be tricky.
I would expect a bike like  and that groupset to come with issues that price point.
Unless someone here has one and it’s all good.

[klindsey00]

There is a whole thread on the wheeltop groups, people seem to love them and not as many issues as the ltwoo electronic groups. At least that is what I'm getting from the handful of smaller youtuber reviews and glancing through the threads on here for the road/gravel groups.

[Rebel_Yell]

Comment and quetion. 

Appears that some of their complete bikes come with wheels named Retrospect. 

Guessing that TanTan must produce Retrospect?
Anyone have any experience with these wheels?  I do know they
Are heavier than most carbon wheels.

Any other info?