flappers... porta-walls. I ran/run them on my 59. You can find them on ebay or check out Lucas tire on the internet. I think they are in Ohio and California.
They worked well on the rear as there is not a lot of weight on the rear and the side walls of the tire don't flex as much. The fronts last about a year and a half. More flex and bulge causing the white wall flex. I ended up running a real wide white on the front and a flapper on the rear. Still good for me.
3" on a 50 series
3" on a 70 series
3" on rear 70 series
