I’m trying to upgrade the factory wheel set on a Rawland xSogn. The bike is designed around 650b x 47-60mm. I’m a big fan of fast rolling Compass tires and am hoping to put together a light weight wheel set that will support the supple sidewalks of the 48mm Switchback Hill tire. I reached out to Compass and they indicated a hooked bead is all but required for their design. I can’t see myself ever running these above 40psi.
CarbonSpeed gets good rep over on the MTB Forums. I'd go those for price and weight.
Would have mentioned CarbonFan but it seems they don't do a hooked-bead offering. I use their 280gm offset hookless rims with the extralight 48. No issues.
Not sure if it’s exactly what you had in mind, but I’m rolling a set of Velocity Blunt SS wheels with 47’s (Teravail Rampart) and couldn’t be happier. The rim itself weighs 395g, not not much more than some of the carbon rims out there. Plus, you can get them anodized and add some bling to your bike.