What does DOT code 4223 mean?

DOT code 4223 indicates the tire was manufactured during week 42 of 2023 (October). This tire is approximately 2.8 years old.

Is a 2.8-year-old tire safe to drive on?

A 2.8-year-old tire has a safety index score of 72%. The tire is entering mid-life aging; regular sidewall inspections are advised.

Will DOT 4223 pass vehicle safety inspection?

A tire stamped DOT 4223 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 2.8 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: #4223

BATCH TELEMETRY:
DOT SERIAL 4223

This technical telemetry report examines tire production batch 4223, manufactured during the 42th week of 2023 (October). Operating at a calculated age of 2.8 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

89%LOW RISK

CALCULATED AGE2.8 Years

MANUFACTUREDWK 42, 2023

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

Manufacture Date

W42 / 2023

October Batch Output

Compound Age

2.8 Years

Natural Vulcanization Progress

Safety Index

72%

Moderate Risk Category

PIT CREW CHIEF VERDICT

"Manufactured in October 2023 (42th week), this batch is currently 2.8 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

BActive

6.6 - 7.7 kg/t (High fuel efficiency)

Grade ScoreClass B

🌧️ 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 4223

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INSPECTING USED VEHICLES

If inspecting a pre-owned vehicle fitted with DOT 4223 tires, note that you are looking at rubber manufactured 2.8 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 4223 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 #4223 US DOT Telemetry Record