I recall when I bought a brand new 78 Audi 5000 it has a set of Fulda tires on it. I had never heard of them. I asked the dealer to swap them out for some "better" tires. He said that Fulda's were the best and they not only had a lifetime warranty, but if one of them went bad, they would replace it with a new tire free as well as replacing the tire on the opposite side of the axle.
Move the clock forward 4 years. The Fulda's had about 40,000 miles on them and still had decent tread. While I was washing the car, I noticed a bulge on the inside sidewall of the RR tire. So I made an appointment with the dealer to see about if the warranty was as good as I was told. So, I'm sitting in the waiting room and the service manager comes up to me and says, "I found one of the other tires was a bit out of round as well as the one with the bulge. If I put 4 new Fulda's on your Audi free of charge, would you pay for front end alignment?" I drove out of there with 4 new Fulda's and a receipt for $50.00 that I paid for the alignment. I looked at the receipt and the retail price for those 4 new, free, tires was a bit over $1200.00. That was in 1982.