Section 36 (Wheel And Tire System): Tire: Inspection: Notes

WARNING: This page is about a different car, the 2005 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.

Take stone, glass, nail etc. off the tread groove.
Replace tire:
CAUTION:
- When replacing a tire, make sure to use only the same size, construction and load range as originally installed.
- Avoid mixing radial, belted bias or bias tires on the vehicle.
1. When large crack on side wall, damage or crack on tread is found.
2. When the "tread wear indicator" appears as a solid band across the tread.
  
  Fig 1: Identifying Tire Tread Wear Indicator
  Courtesy of SUBARU OF AMERICA, INC.
When extremely biased wear on tire tread can been seen, after replacing tire, check wheel alignment. < Ref. to WHEEL ALIGNMENT . >