Yes, really too bad 
(But as always; there is a way…if you don’t care about costs and time…
All we need are two hubs, some spokes and two 349 rims 
)
Sure, you might try Black Jacks, but be prepared to expect mounting trouble:
Problem with Big Apple 16"
The Strida’s original rims do not match (very good) to (extremely) wide tyres 