[MENTION=113466]steelbikeguy[/MENTION], and [MENTION=57478]repechage[/MENTION], shame about the Ambrosios because I like them a lot otherwise. Wish I could find a loose fitting, light, supple folding tire for them.

The grand daddy of them all though was a pair of Sun CR18 wheels I got from Harris. They were 650A size, built for single speed/fixed with a flip-flop rear hub. I cannot do justice with words how difficult mounting ANY tires on these rims was. I broke levers. I bled. I used soap, powder. Tried Panaracer Col De La Vie and El Cheapo tires from Wally World. It was unreal. I ended up throwing them on a too small frame I had laying here, and donating the bike.