Part of my weekly routine as a teen age driver back in the late 50's, was to wash and wax our beloved cars.....also jack up each wheel, let out the air, and with your thumbs, press the Porta-walls back in under the edge of the rim until the little ridges would "catch". If you had a fast car and were a little more aggressive with your driving style, you might have to make a mid-week adjustment.
I started my road life in a 46 Jeep wagon and Pop could monitor my driving habits by a quick visual check!!!! Being top-heavy, the wagon was quick to "spit" out the soft rubber bead....not all the way out, but just enough so there was a noticeable bulge at the rimline.....never gave it a thought that his concern was over safety issues and not just trying to restrict my driving "fun"! Getting my first set of "hand-me-down" REAL whitewalls was like winning the lottery. Great memories from a great time!!!!
Dave
