I contacted Yokohama Tyres to see if there was any chance of a reduction as Kuhmo did for boxhead, but the "Madame Curie of tyres" told me the tyres would be different as our roads are worse here than USA!!!!!
. She also told me I would not get a warranty by importing, I got to thinking, of the many dozens of truck and car tyres I have purchased over the years, I have never had a tyre fail due to a manufacturing fault. I recon it would be hard to prove a manufacturing fault anyway as if it delaminated, they would probably say it was run with too low air pressure or something.