Originally Posted by
Camilo
Was it "too tall" on one side, or just right on that side and too low on the other? That's the way it usually is for me. It's not that the tire bead is not properly in the rim on the "high" area, it's that it is too low in the rim in the "low" area. If that makes sense. I was told early in the game, and have always pumped it up to at least the maximum on the side wall, or a bit above that, to get those low areas to pop up in the rim. Just did it with some tires last night. I think if you search the web for how to deal with this, that is one of the typical suggestions, along with manipulating the bead as you go along.
definitely too tall in localized spots, a couple inches across. too tall by perhaps 3-4mm.
when uninflated, the bead of the tire would sit in the deep trough in the middle of the rim, next to the tube. it can’t be pulled “out” under the hook since there’s nothing to pull it by, or keep it out there - naturally it wants to return to the middle. orange profile doodle below.
for 80% of the circumference, inflating the tube pushed the bead into the correct position, from the orange at-rest position to the correct grey spot under the hook. for a little bit, different spots each time, inflating the tube partially pushed it into the red position.
hitting it to 100psi from a compressor instantly popped it into the correct position…. but it’s not like i could do that roadside with a hand pump. at least i don’t think i could.
