Compare grades
Every UTQG row in NHTSA's list, grouped into one page per tire line. Sizes stay written the way the file has them. The list is not a ranking of the best tire.
U.S. tire reference
UTQG grades and DOT codes, from the public NHTSA files.
Look up treadwear, traction, and temperature grades for a tire line, or decode the plant and manufacture week in a sidewall DOT code.
About this data
These are rows in NHTSA's ratings list, under the brand string that list stores. The list does not say whether a tire is still sold, and it has no category field. Light-truck tires, deep-tread winter-type snow tires, and temporary spare tires are outside the UTQG rule, so a missing line is not a grade. Sorting these rows is an ordering of NHTSA's list, not a ranking of the best tire. Data last verified October 21, 2026 (UTC). Data-quality notes.
215 brands
3,058 tire lines
7,622 grade rows
1,244 plant codes
Read a DOT code
00T ABCDEF 0109
A plant code looks up the company name NHTSA stored for that code. It does not list brands. A date code becomes a manufacture week, including pre-2000 three-digit dates.
Look up a plant code
Search 1,244 equipment plant codes, including former two-symbol codes. The record is the registered company, not a list of brands made there.
Brands with the most rows in NHTSA's list
This counts rows in the ratings file. It is not a quality ranking, not a list of the best tires, and not a list of what is on sale.