Tire Section Names; Uniform Tire Quality Grading; Dot Quality Grades - Subaru 2014 BRZ Owner's Manual

6-1. Specifications

Tire section names

Uniform Tire Quality Grading

This information has been prepared in accordance with regulations
issued by the National Highway Traffic Safety Administration of the
U.S. Department of Transportation.
It provides the purchasers and/or prospective purchasers of
SUBARU vehicles with information on uniform tire quality grading.
Your SUBARU dealer will help answer any questions you may have as
you read this information.

DOT quality grades

I
All passenger vehicle tires must conform to Federal Safety
Requirements in addition to these grades. Quality grades can be
found where applicable on the tire sidewall between tread shoulder
and maximum section width.
For example: Treadwear 200 Traction AA Temperature A
432
Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer