I bought a set of 4 Hankook tires from my local Ford dealer. Within a few weeks of purchase, I started getting a shake while the tires were cold. Once they got up to temperature, the shake went away.

“We serve the top collectors in the world,” says Christian Zörweg. “We’re talking about $50 million collections.” The co-owner of Buben & Zorweg is upstairs in the Sydney boutique of Australian ...