1. The test result of common tire on the slightly bulgy pavement.
2. The test result of new compound tire on the slightly bulgy pavement, it reinforces the property of flexibility of tread, can fill the clearance promptly. It promotes the performance of road contact and comfort.
3. The area of contact between tire and road surface is just business card size, the clearance between tire and road has effected the performance of road contact and increased tire rolling resistance.