Both shoulders wearing faster than the center tread

• 1. Underinflation and / or overload
• 2. Repeated sharp turns at a high speed in cornering
• 3. Improper matching of tires and rims
• 4. Tires are not rotated timely

• 1. Use tires under the recommended air pressure
• 2. Avoid rough driving in cornering
• 3. Use proper rims and mount tires properly
• 4. Rotate tires timely before shoulder wear becomes serious