Are those Kevlar beads on those tires? I found that the old Araya rims are much better off with tires that are at least 25 mm and have wire beads.

Plus, your azz will thank you if you put on 28 mm tires for RAGBRAI instead of 23 mm. Get some cheapies from Performance and run em at 80 pounds. Use the nice Vredesteins for the go-fast bike.