Hello! Does anyone have recommendations for deep 650b wheelsets at affordable price? Not too much in the market and the deepest I could find is only 45mm deep. I'm planning these for a funny project bike with an option of using them later on with some proper gravel frame.

Not many 650B wheel sets left if I search on AliX.
Bought this 650B/40mm deep wheels recently from Elitewheels that I use on my 3T gravel bike with 50mm tires:
https://de.aliexpress.com/item/4001062524224.html

Not really deep wheels but so far so good, I ordered it with the 36T ratchet system, light and stable.
No complaints.

BR
Chris

I don't think there will be anything deeper than 45 mm. I bought last year 40 mm deep wheels from Yuanan (OEM for Elite) cheap