Tread wear
The tread wear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified U.S. Government test course. For example, a tire graded 150 would wear one and one-half times as well on the government course as a tire graded 100.
The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm, due to variations in driving habits, service practices and differences in road characteristics and climate conditions.
See also:
Introduction
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WARNING
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Notes on technical data
The data stated here specifically refers to a vehicle with standard equipment.
Consult an authorized Mercedes-Benz Center for the data for all vehicle variants
and trim levels. ...
Aspect ratio
Relationship between tire height and tire
width in percent. ...