They’re pretty light for a UST rim. Didn’t get the scales out, but seemed lighter than an 819 in my hands.
Obviously with the nipple beds they’re still heavier than a Stans, but then Mavic rims have always been tougher.
Not the widest, but 2mm wider than the 819 will have to do for now… Could do with the 823 going on a serious diet, and them making a 29er version too. That or for Pacenti to make a tougher version of the TL28 as that’s an ideal profile just a slightly soft material for the harder rider.
EDIT: oh and performance wise, they’re stiff. A lot stiffer than a Stans rim, but then you knew that already! Build time takes a while cos of the nipple beds, but truing up is a cinch compared to flexier rims as they’re so stiff.