1. Bridgestone Corp.
2. Continental Automotive AG
3. Cooper Tire & Rubber Company
4. Goodyear Tire & Rubber Company
5. Hankook Tires Group
6. Michelin Tires
7. MRF (Madras Rubber Factory Limited)
8. Pirelli & C SpA
9. Apollo Tires
10. Yokohama Rubber Co. Ltd.