Yeah I would never run an actual "stretch" like some of the crazy bastards out there... Especially considering I'll be taking my family in my car (not that that really makes any difference about wanting to be safe on the road), but I wanted to see what kind of look a certain tyre size on a certain size rim would be, and this proved quite handy.
Of course different manufacturer's widths vary slightly, but it's enough to go on
As for air leaking out when corning because a stretch is that bad, that's just stupid
