I would advise anyone that's concerned about using soap they should research it for themselves to find a "safe" alternative.
The more I learn, the more I find how much I actually don't know.
There are MANY evolving technologies each day and many many different ways to get the same thing done anymore.
To stop learning and not research what is the truth and the exact details behind something and accept what others say as the truth is not how I operate.
In that article he states:
During my 43 years as a motorcycle technician, I've tried everything from Vaseline, axle grease, rear end gear oil, motor oil, soapy water, Crisco, Mazola oil, olive oil, 3-in-1 oil, WD-40, Lionel electric train oil, cod liver oil, castor oil, and candle wax to Vicks Vapo-Rub. All of these products had major drawbacks when it came to tire mounting lubricant and sealant!
Really!? Axle grease and gear oil?
Both of them are designed to put a layer of lubricant between 2 moving parts, of course the tire will spin independent of the wheel and do so for a VERY long time!
Anyone even considering using it doesn't understand some basics.
For this reason that article has no merit on the subject as far as I'm concerned.
I will never claim to know everything (see my second paragraph) but NOT putting those kinds of lubricants on a motorcycle wheel and tire is a no brainer.