I agree w/ rrr, I have on occasion put tubes of both types ,in trailer tires that were radials, and never had a problem w/ them . Would I do it on my daily driver, not unless I had no choice.
Around here , tire dealers have always done what I wanted, if they didn`t , I`d find one that did , it`s my $ , if they want it , they`ll do it my way.
