Originally Posted by
cyccommute
Nope. Right. The tire bead needs to sit down in the channel of the rim and it the tire is tight, putting in a bladder that fills that channel will make it impossible to get the bead down in there. That increases the difficulty of installation. Additionally, the tube is more likely to be pinched during that installation.
Still wrong. You increase the chance of a pinch without inflating the tube to shape. There won't be any installation difficulty. If there is--you're doing it wrong. Or don't know what you're doing.