Testing Values and Process Specifications Table:

The country-specific regulations apply to the minimum tread depth. Countries not listed are to be assessed.

Country	Minimum Tread Depth [mm]
USA	1.6

1. Larger winter tire values for current obligatory use of winter tires.

An axle alignment is a repair procedure and should be charged separately.

Step 1 - Condition, Checking: 

-- Check the tire treads for any foreign objects penetrating the tire; if necessary, remove any foreign objects.

-- Check all tires for the following damage:

• Tears, rips, breaks
• Flattening or flat areas on the running surface
• Porous sidewalls
• Dents on the sidewalls

-- If there are defects, replace the tire.

Step 2 - Tire Wear Pattern, Checking: 

-- Check the tire wear pattern on the front wheels and pay attention to the following:

• Feathered edges of the tire tread indicate a possible faulty toe adjustment.
• One-sided tread wear is a possible indication of a faulty camber.

-- If there are such wear patterns, determine the cause by performing an axle alignment.

Step 3 - Tread Depth, Checking 

-- Measure the tread depth of all tires (including the spare tire) several times at the circumference using the :T40139A  . Tread depth variation indicates damage.

-- Enter the average value of every tire in the Maintenance Table.

-- If the country-specific minimum tread depth is reached (Refer to Testing Values and Process Specifications Table:  for the table for testing values and process specifications.), replace the tire.