Start at the very beginning of the tight section, never the middle. And then put on only about an inch of tire at a time before moving your hand in further toward the middle to put on another inch. Gradually like this, the tire will pop completely onto the rim.
Why does my bike tire pop off the rim?
It is possible that a tire may have an improperly formed bead or a rim sidewall might have a incorrectly designed “hook”, but in today’s age this seems quite unlikely. The most common cause for an inflated tire coming off a rim is improper installation.
How do you get a back tire off without quick release?
Disengage brakes and derailleur gear (gives chain more slack, making wheel removal easier) Work on the nuts and loosen them using a spanner (Pro tip: use a spanner with the exact size of nuts) Gently remove the rear bike wheel. Completely remove the derailleur chain and lift your bike off the ground.