UTQG Tire Ratings Explained: What the Numbers on Your Tires Mean
Every performance tire has a UTQG number on the sidewall — but what does 200 AA A actually mean? Here's a clear breakdown of the treadwear, traction, and temperature grades and how to use them to choose tires.
What UTQG Is
UTQG stands for Uniform Tire Quality Grading — a standardized rating system developed by the US Department of Transportation. Every passenger tire sold in the US must carry UTQG ratings on the sidewall, consisting of three components:
Treadwear / Traction / Temperature
Example: 400 A A or 100 AA A
Treadwear Rating
The treadwear number is a relative measure of expected tread life compared to a reference tire rated at 100.
- 400 treadwear: Expected to last 4× longer than the reference tire
- 200 treadwear: Expected to last 2× longer
- 100 treadwear: Baseline reference
- 80–100 treadwear: Extreme performance/race compounds
Important caveat: These ratings are tested by each manufacturer independently, not by a neutral party. A 400 from one brand and a 400 from another may wear very differently. The numbers are most useful for comparing within a brand's lineup, less reliable across brands.
For the Challenger:
- Daily driver all-season: 400–600 treadwear
- Summer performance street: 300–400 treadwear
- High-performance summer (Michelin PS4S, Pirelli PZero): 300 treadwear
- Drag radials (NT555R2, ET Street): 200 treadwear
- Track-only (RE-71RS, Rival S): 100–200 treadwear
- Slicks and DOT race tires: 60–100 treadwear
Traction Rating
The traction grade indicates the tire's wet braking performance on a standardized government test surface.
- AA: Best wet traction — highest stopping force
- A: Good wet traction
- B: Moderate
- C: Minimum acceptable
Most quality performance tires are rated A or AA. Note: this is specifically wet traction; the rating says nothing about dry grip or cornering.
Temperature Rating
The temperature grade indicates the tire's resistance to heat buildup and its ability to dissipate heat.
- A: Sustained speeds above 115 mph
- B: Between 100 and 115 mph
- C: Between 85 and 100 mph
All tires sold for street use on passenger vehicles must achieve at minimum a C rating. Performance tires are virtually all A or B rated.
How to Use UTQG When Buying Tires
The treadwear number is the most practically useful for a Challenger owner:
- Want tires that last 40,000+ miles: Look for 500+ treadwear
- Want maximum daily performance with reasonable life: 300–400 range
- Going to the track occasionally: 200–300 range gets you better grip with acceptable street life
- Dedicated track/strip use: 100–200 for maximum grip; expect 10,000–20,000 miles
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