Question: how are kumho tires rated?
Answer: Durability. The Khumo tires have a very good tread wear, although not the best out there. Depending on the particular tire, you can expect anywhere from 40,000 to 85,000 mile tread warranty (for example, the Kumho Solus KR21 has 85,000 mile tread warranty, while the Kumho Ecta 4XII has 40,000 mile tread warranty).