What 393.205B-WR means in plain language
When a wheel or rim has an elongated stud hole, it means the hole that holds the wheel fastener in place has become stretched or worn beyond its original shape. Over time, repeated stress—vibration, impacts, or loose fasteners—can cause the hole to deform. Once that happens, the stud cannot clamp the wheel securely, no matter how tightly you torque it.
This is not a minor cosmetic issue. An elongated stud hole undermines the entire fastening system. Even a properly functioning stud and nut cannot create a reliable connection to a deformed hole. The wheel can shift, wobble, or separate during operation—a failure mode that can cascade into brake problems, tire damage, or loss of the wheel itself.
What our enforcement data actually shows
Across our inspection records, 393.205B-WR carries one of the highest out-of-service rates we track. Out of 167 all-time citations in our database, 164 resulted in an out-of-service placement—a 98.2% OOS rate. That is dramatically higher than the all-FMCSR average of 31.4%. In the last 12 months, we recorded 109 citations, with 16 in the most recent 90-day period.
This code is ranked #1269 of 3,036 FMCSR codes by total citation volume, making it relatively uncommon overall. However, when it does appear on a vehicle, enforcement is almost certain to park the truck. The data shows no discretion: inspectors treat elongated stud holes as a non-negotiable safety defect.
Who gets cited most
Our inspection data from the last 180 days shows Minnesota leading with 5 citations (all 5 resulting in OOS), followed by Pennsylvania with 4 citations (100% OOS), and Oregon, Virginia, Massachusetts, Michigan, and New York each with 3 citations and perfect OOS conversion rates. Every state in our top-cited list shows a 100% out-of-service rate, underscoring the consistency of enforcement.
Among carriers, our all-time records show several fleets such as Allen Davis Trucking LLC and Edmunds & Sons LLC with 2 citations each. No single carrier dominates this violation, suggesting it is driven by maintenance practices rather than systematic fleet-level problems.
How severe is this compared to similar codes
393.205B-WR sits within the broader vehicle maintenance category. By comparison, inoperable required lamps (393.9(a)) has generated 660,737 citations with a 15.4% OOS rate—far more common but less likely to be out-of-serviced. General inspection/repair/maintenance violations (396.3(a)(1)) have 236,919 citations and a 45.3% OOS rate. Lighting devices and reflectors (393.11) show 179,734 citations at only 1.8% OOS. The contrast is stark: elongated stud holes result in OOS enforcement more than six times more often than the average vehicle maintenance code.
How to avoid it
Prevention starts with your pre-trip walk-around and extends through proper torque discipline:
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Check stud holes visually before every trip. Look for any deviation from a clean, round hole. If a hole appears slightly larger or oval-shaped, flag the vehicle immediately. Do not assume the defect will self-correct.
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Follow manufacturer torque specifications precisely. Over-torquing accelerates stud hole elongation; under-torquing allows vibration-induced movement. Use a calibrated torque wrench and consult your vehicle manual for the exact spec. Guessing leads to cascading damage.
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Inspect wheel fasteners regularly and tighten loose ones. Our data shows that wheel fasteners loose, missing, or broken (393.205C-WR) co-occurs with elongated stud holes in 8 shared inspections over the last 90 days. A loose fastener is often the earliest warning sign. If fasteners are coming loose between services, the underlying cause may be a developing stud hole problem.
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Monitor Freightliner and Peterbilt vehicles more closely. Our records show Freightliner cited 36 times and Peterbilt 16 times for this violation. If you operate one of these makes, incorporate stud hole inspection into your preventive maintenance calendar, especially if your vehicle is older or has high mileage.
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Watch for co-occurring brake and tire issues. Four of our last 90-day inspections paired elongated stud holes with tire inflation defects, and three with brake tubing/hose problems. If you notice a tire losing pressure repeatedly or brakes feeling soft, inspect the wheels and rims before those issues cascade. A wheel that is loose or shifting due to an elongated stud hole can damage adjacent systems.
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Do not defer wheel work. Unlike some maintenance items, a wheel with an elongated stud hole cannot be safely operated. Repair or replacement is not optional; it is a roadside out-of-service condition in 98 out of every 100 cases our data records.