What 393.75D-TFPCV means in plain language
FMCSR 393.75D-TFPCV prohibits operating a commercial truck or bus with a regrooved, recapped, or retreaded tire mounted on the front axle. The regulation is straightforward: your steer tires—the ones that control your vehicle's direction—must be original or factory-manufactured, not reconditioned.
Why does this matter? Front tires carry the weight of your engine and cab, and they're your primary control point. Regrooved tires have had new tread cut into worn rubber, restoring surface texture but not the structural integrity of the original tire. The FMCSA considers these tires a safety risk under braking and in emergency maneuvers, especially on steer axles where a failure can cause loss of directional control.
This is a straightforward maintenance violation: if you're spotted during an inspection with a regrooved tire on your steer axle, you'll receive a citation regardless of the tire's current condition or tread depth.
What our enforcement data actually shows
Across 13 million inspections in our database, 393.75D-TFPCV is cited rarely. Our records show only 1 citation in the last 12 months and 1 citation in the last 90 days. Out of service rate is 0.0%—meaning every citation issued for this violation has resulted in the truck remaining in service.
For context, the all-FMCSR average out-of-service rate is 31.4%. This code ranks #2796 of 3,036 FMCSR codes by citation volume, placing it in the lower end of enforcement frequency. The rarity of citations doesn't mean the violation is overlooked; rather, it reflects that most fleets either comply with tire replacement policies or are not selected during the specific conditions when an inspector examines steer tires closely.
Since this violation is not eligible for out-of-service placement, a citation will not immediately remove your truck from service. However, you will still face penalties including points on your Safety Management System (SMS) record and potential fines.
Who gets cited most
Our inspection records from the last 180 days show that Kansas has recorded 1 citation for this code, with a 0.0% out-of-service rate. Because the violation occurs so infrequently in our database, no other states appear in our top-states breakdown. This suggests that either compliance is strong nationwide or that steer-tire inspections are concentrated in specific regions or conditions.
At the carrier level, our all-time data shows M4 TRUCKING LLC (USDOT 4333517) with 1 citation. This does not indicate a pattern or systemic problem; it simply reflects the enforcement events captured in our dataset.
How severe is this compared to similar codes
Within the Vehicle Maintenance category, this code sits well below peers in citation frequency. For comparison:
- 393.9(a) — Inoperable required lamps has recorded 660,737 citations with a 15.4% out-of-service rate, making it one of the most frequently cited maintenance codes.
- 396.3(a)(1) — Inspection/repair/maintenance general has 236,919 citations and a 45.3% out-of-service rate, indicating that broad maintenance failures often lead to vehicle removal.
- 393.78 — Windshield condition defective has 157,894 citations but only a 0.3% out-of-service rate, showing that even high-frequency violations may not always result in out-of-service placement.
The dramatic difference in citation volume between 393.75D-TFPCV and codes like 393.9(a) suggests that regrooved steer tires are either rare in the field or are caught less often than lighting or general maintenance defects during routine roadside inspections.
How to avoid it
Preventing this citation requires a simple pre-trip discipline and a tire-replacement policy that your fleet enforces:
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Inspect your steer tires visually before each shift. Run your hand across the tread. If the tread looks uniform and cuts appear to have been deliberately made into worn rubber (rather than natural wear), you may have a regrooved tire. When in doubt, ask your dispatcher or fleet maintenance.
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Know your tire age and replacement schedule. Work with your fleet to document when steer tires are installed. Most carriers replace steer tires every 2–3 years or when tread depth falls below 4/32 of an inch. Use only OEM or new retreads approved for steer-axle use (if your fleet permits retreads on non-steer axles).
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Report worn or suspect tires immediately. Our co-occurring violation data shows that 393.75D-TFPCV appeared alongside tire tread depth violations and proof-of-inspection failures, suggesting that tire issues cluster with broader maintenance oversights. If you notice a tire problem, report it before the next inspection.
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Confirm tire classification during pre-trip. If your fleet allows retreaded tires, ensure they are marked for use on axles other than steer. Steer-axle tires must always be original or factory-manufactured rubber.
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Coordinate with maintenance on tire sourcing. If your fleet is cost-conscious about tire replacement, regrooved tires might seem cheaper. They are not. A single 393.75D-TFPCV citation plus the risk of a steering failure in traffic makes the cost savings insignificant.
This violation is preventable through routine vehicle inspection and adherence to your fleet's tire-replacement policy. Most drivers never see this citation because tire swaps happen in the yard, not on the road.