Bridgestone · tire line
Bridgestone B381: treadwear rating & UTQG grades
Grade summary
Key facts
| Treadwear (NHTSA UTQG) | 240median · range 240–340 · band 200–299 |
|---|---|
| Traction grade(s) | Traction A |
| Temperature grade(s) | Temp B |
| Percentile (all lines) | Median treadwear higher than 10% of 3,020 lines |
| Rank within Bridgestone | #163 of 209 rated lines (by median treadwear) |
| NHTSA records | 7 total; 6 name a specific size (6 distinct sizes) |
| Warranty miles | Not shown (no maker-published figure verified) |
| Price | Not shown (varies by size and store); see “Where to buy” |
What these grades mean in plain English
- Treadwear 240: this is a lower-than-typical treadwear grade, common on sport and high-performance tires. Under UTQG a grade of 200 should wear twice as long as the grade-100 control tire on NHTSA's test course; real-world mileage varies with driving, rotation, alignment and climate.
- Traction A: A: second-highest wet-braking grade. Traction is straight-ahead wet braking only; it does not measure cornering or hydroplaning.
- Temperature B: B: passed the 500 rpm stage but not the 575 rpm stage.
- Ranked just above in Bridgestone: B340 (median 240).
- Ranked just below in Bridgestone: DUELER H/T 684 "S" Spd Rtd (median 240).
NHTSA records for Bridgestone B381
Each row is one NHTSA record as filed by the manufacturer. Sizes are shown exactly as NHTSA lists them; entries such as “All sizes” apply a single grade to several sizes and cannot be matched to one specific size.
| Size (as filed) | Treadwear | Traction | Temperature |
|---|---|---|---|
| All sizes except | 340 | Traction A | Temp B |
| P185/64R14 "S" | 260 | Traction A | Temp B |
| P145/80R14 | 240 | Traction B | Temp B |
| P155/65R14 | 240 | Traction B | Temp B |
| P175/65R15 | 240 | Traction A | Temp B |
| P185/65R14 "T" | 240 | Traction A | Temp B |
| P185/70R14 | 240 | Traction B | Temp B |
Compare this line with others in the same size: 175/65R15, 185/65R14, 185/70R14.
Cost-per-mile calculator
Price and mileage data are pending a licensed feed, so nothing is pre-filled. Enter your own quote and your own mileage expectation (for example the maker's treadwear warranty from the tire's paperwork). Formula: cost per 1,000 miles = price per set ÷ (expected miles ÷ 1,000).
Other Bridgestone lines by treadwear
| Rank | Line | Median treadwear |
|---|---|---|
| 1 | Alenza AS Ultra | 800Treadwear |
| 2 | DUELER H/L ALENZA PLUS "H" & "V" Spd Rtd | 800Treadwear |
| 3 | DUELER H/L ALENZA PLUS "T" Spd Rtd | 800Treadwear |
| 4 | TURANZA SERENITY "H" Spd Rtd | 740Treadwear |
| 5 | DUELER LTH | 720Treadwear |
| 6 | Alenza Prestige | 700Treadwear |
| 7 | DUELER H/L ALENZA "S" Spd Rtd | 700Treadwear |
| 8 | DUELER H/L ALENZA "T" Spd Rtd | 700Treadwear |
| 9 | TURANZA LS-T | 700Treadwear |
| 10 | WEATHERPeak | 700Treadwear |
| 11 | DUELER H/L ALENZA PLUS "W" Spd Rtd | 670Treadwear |
| 12 | ECOPIA H/L 422 PLUS | 650Treadwear |
Similar treadwear from other brands
Other lines in the same treadwear band (200–299) with a page here: Continental ContiSportContact 5P (240), Continental SportContact 6 (240), Continental SportContact 7 (240), Dunlop ENASAVE EC300+ (240), Falken AZENIS FK453CC (240), Falken AZENIS FK510A SUV (240).
Guides that explain these numbers
- What does a tire treadwear rating mean?UTQG basics
- Treadwear rating vs. mileage warrantyTreadwear vs. mileage
- How to make your tires last longerMaintenance
FAQ
What is the treadwear rating of the Bridgestone B381?
NHTSA's UTQG data lists treadwear grades from 240 to 340 (median 240) for the Bridgestone B381, from 7 records. Treadwear is graded in multiples of 20 relative to a government control tire graded 100; it is not a mileage guarantee.
Is the Bridgestone B381 treadwear grade high or low?
A grade of 240 is a lower-than-typical treadwear grade, common on sport and high-performance tires. Compared with every line in the NHTSA data, the median is higher than 10% of lines (dataset median 420). Within Bridgestone it ranks #163 of 209.
What is the cost per mile of the Bridgestone B381?
We do not have a licensed price or warranty-mileage feed yet, so we do not state a cost per mile. Use the formula cost per 1,000 miles = price per set ÷ (expected miles ÷ 1,000) with your own quote and mileage expectation, or the calculator on this page.
Source and caveats
Source: NHTSA tire ratings API, pulled 2026-10-25. Grade definitions: NHTSA TireWise and 49 CFR 575.104. Grades are self-reported by manufacturers. The NHTSA data has no “currently sold” flag (its active field is false on every record), so a listed line may be discontinued. See methodology.