Originally Posted by
Zeppelin
They are claiming an aero advantage for a 30mm rim but I can't imagine it being significant...
I think that you are right. That's not deep enough for much if any aero advantage.
Originally Posted by
Zeppelin
I think I would lower the weight of my bike by 350-400g
That's not insignificant with respect to how the bike's handling feels. I have upgraded cheap stock wheels to lighter budget wheels and had no regrets.
You might also check if you can get some lighter, faster rolling tires if you're still using whatever came with the bike.