Originally Posted by 77Univega
--- Funny you should ask. I happen to have those very tires on my '70's road bike which has straight sided rims. Found out that those high pressure tires are made for hook bead rims. So after I had my FIRST blow off (at 115 psi), I have been inflating them to 95 psi. No problems since then.
when you say "hook bead" rims are you referring to a rim that has a little lip on the inside of the rim just below the edge? if so that's what i got. my rear rim is a sun double wall rim, & the front is a older wider single wall rim. both are an aluminum alloy with that lip on the inside. how long did it take until your tire blew off? i would imagine right away eh? i didn't realize that they even made rims without that lip. what holds the tires on a kind of rim with a straight edge?