Thanks for the heads up on the Greenball Towmasters.
My respect-o-meter went way down with the franchise tire dealers after I tried to enforce my Lifetime Road hazard Warranty that I paid extra for when the tires were new. I had a Bridgestone Dueler develop a sidewall bulge and brought the tire in. I was told the tire was almost at it's 4 year death schedule so the Lifetime was basically ended. Explanation that I thought the warranty was for my lifetime and not the tire's fell on deaf ears.