I've seen tubes that look like that after they had been installed in a set of tires that had a fold in the tube like yours look like in your picture. They would usually smooth out after a few days when inflated up like yours are now Look very closely at yours, if the seration on the outer sides are missing in the fold DON'T use them If they are missing then I'm sure thier defective from the maker


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)