Well, no. It does not.
BXT = Tideace = Haideli as far as I can tell but who is the actual manufacturer I cannot say. I ordered a BXT Pro SL (not the aero one) on aliexpress. They say they have a Tüv certification for the frame/fork but I think it's fake at least I cannot find anything on the Tüv Süd website.
Anyway I simply could not resist it was EUR 270 shipped. Paid ~ EUR 65 Tax and customs, so EUR 335 with tax and shipping, including everything. What I liked about this frame is that it has all the traditional industry standard mounts (BSA 68), C-type brake, 31,8mm seat post, 34,9mm fd and so on. They shipped it via Singapore which was very helpful as I did not have to argue with the customs if the anti dumping fee has to be paid on it (which applies to certain bike products from China here in Europe).
The frame came relatively fast and was packaged well, first off it seems to be solid. It has matte UD finish and at least clear coating but I cannot tell if there is possibly a black matte coating below it looks very even, even for an UD finish. The decals are below the clear coating, the quality of the paint job is /okay/ but don't expect too much.
Frame comes in at 950g at size 55 and fork was 360g uncut. What was missing in my eyes were the rubber plugs for the DI2 holes. But they said these were not included and that's normal. I installed the frame with DI2 though but I did not need the large hole below between the bottle cage bosses so I covered it with black electrical tape.
The frame came without different inserts for DI2 installation so you would have to drill the existing inserts to fit a Di2 plug. I could not find a replacement for them but as I got a good deal on very long DI2 cables I just spliced them myself so I cut the plug on one end and could fit them through the existing hole for the mechanical shift cable. I covered the other side using black electrical tape again.
I did install the battery below the chain stay on the non-drive-side which is not intended but I used the problem solvers battery mount without a problem. You COULD fit the DI2 plug through the bottom bracket opening though. It was relatively tricky to route the DI2 cables due to the laminated BSA shell with relatively small holes, this would have been even harder with plugs on them but it WILL BE possible.
Another issue was the derailleur hanger which pointed well inwards. This is a general problem of the most new frames caused by manufacturing tolerances but this was a rather huge tolerance. I had to bend it very much and had to be very careful to not break it but I was still able to get it right.
Overall it feels very good I did about 2k on the bike now and no issues so far. I jumped over potholes and up and down the curbs and everything without any problems.
If you are interested I can send you some detail pictures.
Just to add I am 1.83m and am riding size 55 with 120mm -17 stem and additional 15mm stack. That feels just right but is a very race oriented setup, most probably this one is not for the faint-hearted, and it is definitely not the really tall ones. (55 size just has 145mm head tube). It seems the other frames come in larger sizes too.
