Originally Posted by
branko_76
...These old rims are also straight walled (no hooks), the Continental tires I bought state right on the sidewall USE ONLY ON HOOKED RIMS, well, that didn't stop me. With safety goggles and aviator ear muffs on, I inflated them to 100psi, let them sit that way for a few days and then took it for a spin. So far so good.
...
I've gotten away with that, too. (Though not up to 100psi) If you get a tight-enough fitting tire (smallish for its nominal sizing) on a tight-enough fitting rim (largish for its nominal sizing), you can get away with it. You can also stop and check the sidewalls as you inflate; sometimes if the fit is not fortuitous, one part of the bead will start creeping up and get ready to unseat itself and -- KABLOOEY!
If you're paying attention you can catch this before it blows, and deflate in time. I pretty much avoid playing this game anymore.