Originally Posted by
cyccommute
I have problems with some of the points in this video. The first is the statement that tire pressure is set to 1/2 the blowoff value of a "standard rim". I've heard this stated in lots of places but I have yet to find a credible citation of where that comes from. Yes, it's higher than the maximum pressure but twice as much? I find that very hard to believe for all tires in all widths and all possible rim widths. I've had tires that blew off at the nominal highest pressure setting.
The rated pressure is half of what it took to blow off of the test fixture "rim", not half of what it takes for the tire to blow off of rims in general.