Clement LGG 28c mounted on I9 ULCX wheels (21mm inner width) = 29.05mm wide at 90psi. Easily cleared my Enve Road Disc fork. The wider rim doesn't really make the tire taller, just wider.
Also, tire weighed 236g for the bean counters. I only weighed one of the two.
Haven't ridden them yet, so no real world thoughts on it.