They look like they are meant to be a competitor to the Cadex 50 Ultra but are priced about a grand less
That was the first thing that jumped out to me as well. An internal of 21 is perfectly fine. But with the external being just under 28mm, you are probably stuck running 25mm tires if you want to maximize their aerodynamics. A tire labeled at 28mm is probably going to measure out to 29+mm on them.
Just beware of shipping times. Hopefully they have improved but it took about 10 weeks for me to get my wheels from order to delivery, and most of that time was spent in transit - literally a slow boat from China.
I wouldn’t call winspace wheels an off brand anymore I think they are established now. The question is do you have a dealer distributor in your area for that kind of money that would be a piece of mind else all the warranty and service stuff could be bothersome.
And for the weight they play in the enve ses 4.5. Space but are 100g. Lighter.
I’d argue the only thing zipp/enve have on winspace is the dealer network for service and warranty and winspace is expanding a lot there.