So rims that are tough as shlt lose to rims you've never ridden that are 1mm wider.........Sorry Mavic, your (less) narrow rims still fail.
http://nsmb.com/ibis-wide-rims-ride-review/
I have not tried the Ibis version yet, but I have ridden a fat bike rim laced to a normal bike. It was heavy, but the ride was amazing. 20 psi and made a trail bike stick like a DH bike.
Okay you're probably talking about other ones
You think you really WANT a 35mm trail rim? I'm sure the grip is rad, but that's gotta make the bike roll a lot slower having that much more of the middle strip of the tire in constant contact with the ground.