Pinpoint Test B : Outer Edge, Shoulder Wear

Diagnostic Overview 

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .

1. Possible Sources 
   • Excessive toe in and/or positive camber
   • Incorrect wheel and tire assembly rotation intervals
   • High-speed cornering

2. B1 MEASURE THE TREAD DEPTH
   
   
   • Using a tread depth gauge or similar tool, measure the outside edge/shoulder tread depth.

   Is the tread depth greater than 1.588 mm (0.0625 in) ? 

   Yes	ROTATE the wheel and tire assemblies. CHECK and ADJUST the toe to nominal -0.15 degrees (toe out). CHECK and ADJUST caster and camber to nominal. REFER to: Front Camber and Caster Adjustment .

   No	INSTALL a new tire(s). CHECK and ADJUST the toe to nominal. CHECK and ADJUST caster and camber to nominal. REFER to: Front Camber and Caster Adjustment .