What does DOT code 4125 mean?

DOT code 4125 indicates the tire was manufactured during week 41 of 2025 (October). This tire is approximately 0.8 years old.

Is a 0.8-year-old tire safe to drive on?

A 0.8-year-old tire has a safety index score of 92%. The tire compound is safe for regular highway use.

Will DOT 4125 pass vehicle safety inspection?

A tire stamped DOT 4125 will pass annual vehicle inspections provided tread depth exceeds 1.6mm (2/32") and no visible sidewall bulges or deep cracks are present. However, compound hardening at 0.8 years affects wet stopping distance.

Where is the 4-digit DOT date code located?

The 4-digit DOT date code is stamped on the outer sidewall of the tire, immediately following the letters "DOT" and manufacturer plant codes.

🇺🇸 US DOT BATCH REPORTOPTIMAL TRACK CONDITIONSERIAL REF: #4125

BATCH TELEMETRY:
DOT SERIAL 4125

This technical telemetry report examines tire production batch 4125, manufactured during the 41th week of 2025 (October). Operating at a calculated age of 0.8 years, the structural integrity and polymer elasticity of this serial series have been evaluated against NHTSA and NASCAR safety benchmarks.

PIT TIRE SAFETY INDEXOPTIMAL TRACK CONDITION

97%LOW RISK

CALCULATED AGE0.8 Years

MANUFACTUREDWK 41, 2025

Pit Assessment: Rubber compound is fresh. Maximum grip, wet braking performance, and sidewall flexibility.

Manufacture Date

W41 / 2025

October Batch Output

Compound Age

0.8 Years

Natural Vulcanization Progress

Safety Index

92%

Low Risk Category

PIT CREW CHIEF VERDICT

"Manufactured in October 2025 (41th week), this batch is currently 0.8 years old. The polymer matrix and elastic cross-links are fresh, guaranteeing optimal thermal dissipation, maximum wet grip, and short stopping distances."

Estimated Wet Braking ImpactNormal (100% Grip Capacity)

Pit Crew RecommendationSafe for all highway, winter, and high-speed track conditions.

REGULATORY GRADING FRAMEWORK

STANDARDIZED LABELLING METRICS

Cross-reference batch age with standardized grading for rolling resistance, wet grip index, and pass-by exterior noise.

REGULATION (EU) 2020/740 COMPLIANT

European Union Tire Label Metrics

⛽ Fuel EfficiencyISO 28580

AActive

RRC ≤ 6.5 kg/t (Ultra-low rolling resistance)

Grade ScoreClass A

🌧️ Wet Grip SafetyISO 23671

AActive

Grip Index G ≥ 1.55 (Shortest wet braking)

Grade ScoreClass A

🔊 Exterior NoiseUNECE R117

68dB

Quiet (Below future EU threshold by ≥3dB)

Noise ClassClass 1

FIELD GUIDANCE & TRACK SCENARIOS

REAL-WORLD IMPLICATIONS FOR DOT 4125

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INSPECTING USED VEHICLES

If inspecting a pre-owned vehicle fitted with DOT 4125 tires, note that you are looking at rubber manufactured 0.8 years ago. These tires are within their safe usable lifespan, provided tread depth exceeds 3mm.

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TRUNK SPARE TIRE ASSESSMENT

Found DOT 4125 on your emergency spare? Unused rubber still oxidizes due to ambient temperature swings and ozone in the trunk. This spare remains safe for standard emergency highway use.

← DECODE ANOTHER DOT CODEBatch #4125 US DOT Telemetry Record