Both the Boyd Altamont and CCC will handle 40mm tires and are pretty light aluminum rims. The Altamont is 22 inner for 25 to 45mm tire. The CCC is wider, 25mm inner and does something like 32mm tire on up to 50/2". Both are low profile, less than 25mm, I think.
Last edited by Camilo; 04-12-22 at 05:50 PM.