What is the the tire clearance n your frame ? In my Avenger Shuttle SL I have 32 mm tire. I have no issues with installation of those 34 mm external XMCS wheels. I have still some space. Please not that the rear triangle has different dimensions than the tire clearance. There is much more space there! I also was wondering about that, but I contacted with the expert so Peter directly, and he confirmed.

It's 32mm and it should fit aswell. Thanks 

I'm looking at these: https://www.tukuswheels.com/products/evolution
Not sure about carbon-steel hybrid spokes - never seen that before. Never heard of RD60 hub before as well. Also no weight limit listed... But sub 1100g wheelset at 50mm is very impressive. And at a very reasonable pricepoint (at least compared to 9velo and such).
If everything is as it looks it's a very nice looking proposition... I contacted them and i'll post their answers here if anyone is interested about more info.

Limits 100kg?
Why too good to be true there are a load of Sub 1000g or close to 1000g 50mm wheelsets on the market at the moment
9Velo
Avians
Zen Carbon
Nextie
Overfast
Brisk
Brisk

I also found Monokeros on Cyclegears - https://cyclegears.net/products/monokeros-ares-wheelset
Anyone heard anything about these? Can only find their IG and FB posts. 0 customer reviews anywhere...

Does anyone have any input about their Ghost series? I'm looking at 50mm, 985g, 25mm internal, 32mm external, 110kg system weight limit... Sounds insane and a bit too goo to be true? Please share your opinions. Thanks