393.75B-OOS — Tire tread depth insufficient (steer)

FMCSA violation code under Vehicle Maintenance. 299 events recorded in roadside inspections. Severity weight: 7.

Violation code 393.75B-OOS is a Federal Motor Carrier Safety Regulations citation issued under 49 CFR 393.75. It tracks a specific compliance failure recorded against motor carriers and drivers during FMCSA roadside inspections. The code rolls up into the FMCSA Safety Measurement System (SMS) Vehicle Maintenance BASIC, which feeds the carrier's percentile ranking and prioritization for FMCSA interventions. It applies to interstate motor carriers, drivers, and the commercial motor vehicles they operate; intrastate operators are subject when their state has adopted Part 350 of the FMCSR by reference. It carries a severity weight of 7, 299 citations have been recorded against this code in the FMCSA inspection record.

Severity Weight
7
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
299
Code:
393.75B-OOS
Code System:
FMCSR
BASIC Category:
Vehicle Maintenance
OOS Eligible:
No
Severity Weight:
7
Total Events:
299
Carriers Cited:
254

Ranks #1,111 of 3,146 FMCSR codes by citation frequency • OOS rate of 73.6% is above the FMCSR-wide average of 33.2%.

Violation Description

Tire on the steer axle of a CMV has less than 4/32 inch tread depth.

About This Violation Code

Code 393.75B-OOS falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 7 (scale 1-10, higher = more severe).

When this violation is cited during a roadside inspection, it contributes to the carrier's Vehicle Maintenance BASIC score. Carriers with high BASIC percentiles may be prioritized for FMCSA interventions including warning letters, investigations, or compliance reviews.

Regulatory Reference

Federal Motor Carrier Safety Regulations

This violation references 49 CFR 393.75B in the Federal Motor Carrier Safety Regulations.

Events (all time)
299
OOS Events
220
OOS Rate
73.6%
Top State (180d)
Illinois
21 events

Top Enforcing States

Where 393.75B-OOS is most commonly cited (last 180 days)

1. Illinois
21
OOS 71.4%
2. North Carolina
15
OOS 80.0%
3. Iowa
5
OOS 80.0%
4. New Mexico
4
OOS 100.0%

Click a state to see roadside inspection activity, top stations, and carrier profiles in that jurisdiction.

Citation Trend (12 months)

Monthly count of 393.75B-OOS citations. Red bars mark months with OOS-triggering citations.

9
2025-07
9
2025-08
12
2025-09
12
2025-10
8
2025-11
7
2025-12
3
2026-01
12
2026-02
15
2026-03
6
2026-05
10
2026-06

Most Active Stations

Inspection stations citing 393.75B-OOS most often (last 180 days)

1. I 40 NEAR MM 41
2
OOS 100.0%
2. I74
2
OOS 100.0%
6. I-57
1
OOS 100.0%
7. il-i-57-n/b
1
OOS 100.0%
8. I-80 EB
1
OOS 100.0%
9. IL-83
1
OOS 100.0%

Often Cited Together

Other violations commonly found on the same inspection (last 90 days)

Citation patterns suggest related root causes (e.g., HOS violations paired with logbook errors).

Top Carriers Cited

Ranked by frequency • 254 carriers total • Page 1 of 11

# Carrier USDOT # Violations
#1 SOUTHVIEW SANITATION SERVICES INC 4183417 3
#2 EZ CARGO INC 3077844 3
#3 RBR EARTHWORKS LLC 4124904 2
#4 MAIN HOSPITALITY LLC 4182291 2
#5 APEX ROAD CARRIERS INC 4152312 2
#6 ONE STOP RECYCLING 3547828 2
#7 AID TRUCKING LLC 4356626 2
#8 HARRINGTON & SONS INC 746150 2
#9 VENEZIA BULK TRANSPORT INC 1079966 2
#10 ALB EXPRESS TRANSPORTATION LLC 3590433 2
#11 FREIGHTCOMM LLC 2838697 2
#12 HORN TRUCKING CO LLC 3646974 2
#13 LITTLE J'S ENTERPRISE LLC 1951225 2
#14 LJMC GENERAL SERVICES INC 3207814 2
#15 CCS TRANSPORTATION LLC 4092198 2
#16 J2P LLC 2900459 2
#17 RUHLMAN EILERS CONSTRUCTION LLC 2279704 2
#18 TIQUITO GROUP LLC 4023536 2
#19 NICOLAS SANCHEZ TREJO 2880289 2
#20 AFFORDABLE HOLDINGS 2105025 2
#21 PRICE TRANSFER INC 50484 2
#22 KLU TRANS LLC 4263046 2
#23 JONATHAN CHAPPELL 3329476 2
#24 MYRTLE PUMPING LLC 2828244 2
#25 TOP NOTCH CONSTRUCTION INC 4226944 2

Recent Inspections

Latest inspections where 393.75B-OOS was cited • 299 total events • Page 1 of 12

Date Report # State Level OOS
88262647 IL Level 1 Yes
88219384 IL Level 2 No
88161795 IL Level 1 Yes
88120664 IL Level 1 No
88120525 IL Level 1 Yes
88120531 IL Level 2 Yes
88054903 IL Level 2 Yes
87958455 NC Level 2 Yes
87914993 NM Level 2 Yes
87868229 IL Level 1 Yes
87837525 NC Level 2 Yes
87775728 NC Level 2 Yes
87764210 IL Level 1 Yes
87453316 IA Level 2 Yes
87408623 IA Level 1 Yes
87408167 NM Level 2 Yes
87371856 IL Level 2 Yes
87290783 IL Level 2 Yes
87283606 IA Level 2 Yes
87274853 IL Level 2 No
87274850 IL Level 4 No
87262551 IL Level 1 Yes
87262385 IA Level 2 Yes
87234384 IL Level 1 No
87214448 NC Level 2 Yes

How to comply with violation code 393.75B-OOS

  1. Locate the regulation in the eCFR. Open https://www.ecfr.gov/current/title-49/section-393.75 on eCFR.gov to read the legal text the citation is written against. The eCFR is the National Archives' continuously updated electronic Code of Federal Regulations and is the canonical reference for any FMCSR section.
  2. Determine if your operation is subject. Confirm whether your operation is interstate (always subject to the FMCSR) or intrastate (subject when your state has adopted 49 CFR Part 350 by reference; most have). Intrastate operators in non-adopting states may be subject to a state analog instead of the federal rule.
  3. Identify the documented requirement. Read the requirement carefully: "Tire on the steer axle of a CMV has less than 4/32 inch tread depth." Map it to the specific equipment, driver document, or operational practice it covers.
  4. Inspect or maintain to standard. Build a recurring inspection, training, or filing routine that catches this gap before a roadside inspector does. Pre-trip checks, scheduled preventive maintenance, driver-qualification file audits, and supervisor reviews are the standard places this kind of issue is caught early.
  5. Document compliance to demonstrate it on review. Keep a dated, signed record of each inspection, repair, training session, or filing tied to 393.75B-OOS. During an FMCSA compliance review or a customer onboarding audit, the documentation is what proves the program runs — undocumented compliance is indistinguishable from non-compliance to the auditor.

Frequently asked questions about 393.75B-OOS

What is FMCSA violation code 393.75B-OOS?
Tire on the steer axle of a CMV has less than 4/32 inch tread depth. The citation appears as code 393.75B-OOS on roadside inspection reports issued by the Federal Motor Carrier Safety Administration and rolls up into the Vehicle Maintenance BASIC.
Is 393.75B-OOS an out-of-service violation?
No. Code 393.75B-OOS is not Out-of-Service eligible. A citation under this code is recorded on the inspection report and counts toward the carrier's BASIC percentile, but it does not by itself trigger an Out-of-Service order at the roadside.
What's the severity weight of 393.75B-OOS?
393.75B-OOS carries a severity weight of 7 on FMCSA's 1–10 scale. Higher weights indicate violations more strongly correlated with crash risk; FMCSA multiplies the weight by a time factor (3× for citations 0–6 months old, 2× for 6–12 months, 1× for 12–24 months) when computing the carrier's Safety Measurement System percentile.
How many inspections have cited 393.75B-OOS?
299 inspections in our FMCSA mirror cite 393.75B-OOS, of which 220 (73.6%) resulted in Out-of-Service orders. The Recent Inspections table on this page lists the most recent citations with date, state, level, and OOS flag — click any row to see the full inspection report.
Which BASIC category is 393.75B-OOS in?
393.75B-OOS rolls up into the Vehicle Maintenance BASIC of FMCSA's Safety Measurement System. The BASIC determines how the citation feeds the carrier's percentile ranking — carriers with high percentiles in a BASIC are prioritized for FMCSA interventions including warning letters, focused investigations, and full compliance reviews.
What does a carrier do to fix 393.75B-OOS?
Resolving a 393.75B-OOS citation has two parts: (1) correct the underlying condition immediately — repair the equipment defect, retrain the driver, file the missing form, or update the maintenance record — and (2) document the correction in the carrier's compliance file, ideally with date, time, and the name of the person who performed the work. Carriers that believe the citation was recorded in error can file a Request for Data Review through the FMCSA DataQs system within 24 months of the inspection date.
Where can I find related violation codes?
The "Often Cited Together" panel on this page lists violations frequently appearing on the same inspection as 393.75B-OOS — these usually share a root cause (for example, an HOS violation paired with a logbook error). The All Violation Codes index links to every code in the system, and the BASIC category page lists every code in Vehicle Maintenance.
Where can I find the full text of 393.75B-OOS?
The full regulatory text is published on eCFR.gov at 49 CFR 393.75. The eCFR is the official, continuously updated electronic Code of Federal Regulations maintained by the National Archives. The TruckCodex page mirrors enforcement data; the eCFR has the legal text the citation is written against.

About FMCSA violation codes

Every violation found during an FMCSA roadside inspection is recorded under a code drawn from the Federal Motor Carrier Safety Regulations — the codified safety rules motor carriers, drivers, and commercial motor vehicles must comply with in interstate commerce. Codes roll up into one of seven Behavior Analysis and Safety Improvement Categories (BASICs): Unsafe Driving, Hours-of-Service, Driver Fitness, Controlled Substances/Alcohol, Vehicle Maintenance, Hazardous Materials Compliance, and Crash Indicator. Each code carries a published severity weight (1–10) and an Out-of-Service eligibility flag.

Citations counted in the FMCSA Safety Measurement System (SMS) feed a 24-month rolling percentile rank for every motor carrier. Recent citations weigh more heavily than older ones — FMCSA applies a 3× multiplier to events 0–6 months old, 2× for 6–12 months, and 1× for 12–24 months. Carriers above the published intervention threshold for a given BASIC are prioritized for warning letters, focused investigations, and full compliance reviews.

TruckCodex mirrors the FMCSA Motor Carrier Management Information System (MCMIS) and the published violation dictionary on a daily refresh cycle. We do not author or modify violation records — every count, severity weight, and OOS flag on this page reflects what the FMCSA has on file. For real-time confirmation immediately before an enforcement decision, click through to the FMCSA Violations Search link above. Carriers who believe a citation was recorded in error can file a Request for Data Review through the FMCSA DataQs system.

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