Originally Posted by
burnthesheep
It's a very common error even installing butyl that folks don't put just enough air in the tube to give it shape on install to prevent pinches.
Then you get topics posted like "my brand new tube/tire/wheelset keeps getting flats". Then you see the person yanking the tube out in like 2 seconds and throwing a new flat as a pancake tube in the rim/tire and going to town.
...
There's an inflation technique that is fast, requires no CO2 or even a pump that gets the tube pressure perfect for install. And you cannot over inflate. Not possible. Just blow the tube up with your breath. That's right. Put the valve in your mouth and blow as hard as you can. (I finish by closing my throat off and using just my mouth.) Done. If that tube's been under your seat, you might be fine-tuning your immune system at the same time.