It reported that Kumho used excessive amounts of recycled rubber as raw materials in the Tianjin factory (DOT Code C0/1C0) to reduce costs, which could lead to the sidewall of tires to bulge and potentially rupture .

It explained that the proportion of recycled rubber should be calculated by weight, not by quantity, and that 'it was inaccurate to rely on video footage to determine the quality of tires'.

[7] In July 2018, a Chinese company Doublestar finalized a deal to acquire Kumho Tire Co., Ltd. from Kumho Asiana Group in a $607 million deal, giving to Doublestar a 45 percent stake and control of South Korea's second-largest tire manufacturer.

In May 2019, following a complaint filed by the United Steelworkers in November 2017, an administrative law judge with the National Labor Relations Board (NLRB) found that Kumho Tire had engaged in "pervasive" illegal conduct during a unionization campaign at the company's tire manufacturing plant in Macon, Georgia, with at least 12 managers including the company’s CEO issuing illegal threats to lay off employees or to close the plant if it unionized, as well as illegally interrogating employees and creating an impression of surveillance.

In partnership with Manchester United, Kumho launched a "Play Safer" campaign designed to increase youth road safety awareness.

[14] On February 13, 2014, Darren Rovell of ESPN announced on his Twitter page that Kumho was named the official tire of the NBA.