A loose wheel flying off a semi-truck at highway speed is not a freak accident. In most cases, it is a preventable failure with a paper trail attached to it. If you were hit by a runaway wheel, or watched a tire separate from an 18-wheeler and lost control of your own vehicle as a result, what happened was probably not random. Someone made a decision, missed a warning sign, or skipped a step that put that wheel in motion.
These cases are more complicated than a typical two-car collision because several people or businesses may share responsibility. The driver, trucking company, maintenance provider, parts manufacturer, or seller may all have played a role. Determining who is liable usually requires looking beyond the crash scene and examining maintenance records, inspection reports, repair invoices, and the failed components themselves.
Why Do Semi-Truck Wheels Come Loose?
A semi-truck wheel may separate because of:
- Improper wheel installation
- Loose or overtightened lug nuts
- Worn wheel bearings
- Broken wheel studs, hubs, or rims
- Defective components
- Inadequate inspections or maintenance
- Failure to address vibration or other warning signs
The exact cause matters because it often points toward the person or company responsible for the accident.
Who May Be Liable When a Truck Loses a Wheel?
The answer is rarely limited to one party. Wheel-separation accidents often involve several people or businesses, each with a different responsibility for operating, inspecting, maintaining, repairing, or supplying parts for the truck.
Missouri follows a comparative fault system, which means responsibility may be divided among multiple parties according to their share of the fault. That makes it important to investigate every potential defendant before accepting a settlement or signing a release.
The Truck Driver
Commercial drivers are expected to inspect their vehicles and pay attention to conditions that could make the truck unsafe. A driver may share liability if they failed to complete an adequate inspection, ignored an obvious problem, or continued driving after noticing vibration, unusual handling, noise, or another warning sign.
A driver may also be responsible for failing to report a known problem to the carrier or maintenance department.
That does not mean the driver is automatically liable whenever a wheel comes off. Some mechanical defects are hidden and would not be visible during a routine inspection. The question is whether the driver knew or reasonably should have known that something was wrong.
Driver inspection reports, communications with dispatchers, electronic records, and statements made after the crash may help answer that question.
The Trucking Company
The trucking company is often one of the central parties in a wheel-separation case. Carriers are responsible for keeping the commercial vehicles under their control in safe operating condition.
A trucking company may be liable if it delayed necessary maintenance, ignored earlier reports of wheel or tire problems, used inadequate inspection procedures, or kept a truck on the road despite a known defect. Liability may also arise from poor training, weak supervision, or the use of unqualified maintenance workers.
Maintenance records can show whether the truck was overdue for service, whether similar problems had been reported, and whether repairs were postponed.
The driver’s employment status may complicate the case. Many carriers use owner-operators or classify drivers as independent contractors. Even so, that label does not automatically remove the carrier from the case. The actual relationship between the driver, carrier, truck, and shipment must still be examined.
A Maintenance or Repair Company
Trucking companies frequently outsource tire changes, wheel installation, brake work, and other repairs. If a wheel separates because that work was performed incorrectly, the outside maintenance provider may share liability.
Improperly tightened fasteners, damaged components, incorrect parts, or a failure to identify visible wear can all contribute to a serious failure.
Repair invoices, work orders, technician notes, and service records may establish what work was completed, who performed it, and whether proper procedures were followed. If the wheel came loose shortly after being serviced, those records may be especially important.
In some cases, the party most responsible for the accident never drove the truck at all.
The Wheel or Parts Manufacturer
Not every wheel separation is caused by poor maintenance or improper installation. A wheel, rim, hub, bearing, stud, lug nut, or another component may have been defective.
A product liability claim may be possible if the part was defectively designed or manufactured, or if it was sold without adequate instructions or warnings. These cases often require engineers or other mechanical experts to examine the failed parts and determine whether the component performed as intended.
Preserving the wheel and related components is critical when a defective part may be involved. Once those items are repaired, discarded, or altered, proving what went wrong becomes much harder.
A Parts Distributor or Seller
A parts distributor or seller may also become part of the case when a defective or unsuitable component entered the truck’s repair supply chain.
Liability depends on the circumstances, including whether the correct part was supplied, whether it was accurately identified, and whether the seller knew or should have known it was unsafe or inappropriate for the vehicle.
This issue will not arise in every case, but it should not be ruled out before the source of the failed part is known.
What Federal Trucking Regulations Apply?
Federal regulations require motor carriers to systematically inspect, repair, and maintain the commercial vehicles under their control. Commercial truck wheels, rims, and fasteners must also remain in safe condition.
Drivers have responsibilities as well. Before operating a commercial vehicle, a driver must be satisfied that important equipment is in proper working order. Defects that could affect safe operation or lead to a breakdown are supposed to be documented and addressed.
A regulatory violation does not automatically establish liability. It can, however, provide important evidence that a carrier, driver, or maintenance provider failed to meet an applicable safety standard.
Relevant evidence may include:
- Driver inspection reports
- Maintenance histories
- Repair invoices
- Annual inspection records
- Company maintenance policies
- Communications about mechanical problems
- Records showing when the truck was last serviced
These records may reveal not only what went wrong, but also how long the problem existed and who had an opportunity to correct it.
What Should You Do After a Truck Wheel Accident?
The aftermath of a wheel-separation accident can be confusing because the truck may never physically strike your vehicle. You may have been hit by the detached wheel, forced off the road while trying to avoid it, or struck by another vehicle reacting to the same hazard.
When possible:
- Seek medical care.
- Report the crash to law enforcement.
- Photograph the truck, detached wheel, roadway, and damaged vehicles.
- Record the truck number, trailer number, license plate, and USDOT number.
- Identify the driver and trucking company.
- Get contact information from witnesses.
- Preserve your vehicle and other damaged property.
- Avoid giving a recorded statement before understanding your rights.
- Speak with an attorney before accepting a settlement.
Do not assume the police report will contain everything needed to prove the claim. Officers may document the basic facts, but determining why the wheel came off often requires a separate mechanical investigation.
The physical evidence is especially important. The wheel, hub assembly, lug nuts, studs, bearings, and other components may all help explain what failed. Maintenance records, electronic data, inspection reports, and dash camera footage may also be lost or overwritten if they are not requested quickly.
How Can a Truck Accident Attorney Help Determine Liability?
A trucking company or insurer may try to characterize a detached-wheel accident as an unpredictable mechanical failure. The maintenance history and physical evidence may tell a different story.
A truck accident attorney can send preservation notices before the truck is repaired or returned to service. An attorney can also seek inspection and maintenance records, repair invoices, driver communications, electronic logging information, onboard data, and available video footage.
Mechanical and engineering experts may then examine the failed components to determine whether the wheel came loose because of improper installation, neglected maintenance, component fatigue, or a product defect.
That investigation can help answer several important questions:
- When did the unsafe condition develop?
- Should an inspection have revealed it?
- Who last installed or serviced the wheel?
- Were earlier problems reported?
- Did the carrier postpone maintenance?
- Was a defective part involved?
- Which insurance policies may apply?
Each potential defendant may try to place responsibility on someone else. The carrier may blame the repair shop. The shop may blame a defective part. The driver may say the company never disclosed an earlier problem. A complete investigation is necessary to sort through those competing explanations.
It is also important to understand the effect of a settlement before signing a release. Resolving a claim with one party before the investigation is complete may make it more difficult to pursue compensation from others.
Talk With Ryan R. Cox & Associates LLC
A semi-truck wheel does not usually come loose without a reason. The explanation may be found in an incomplete inspection, overdue maintenance, negligent repair work, a defective part, or a combination of failures.
Ryan R. Cox & Associates LLC represents people injured in commercial vehicle accidents throughout St. Charles County and the surrounding communities, including St. Charles, St. Peters, O’Fallon, Wentzville, and Lake St. Louis.
If you were struck by a detached truck wheel or injured while trying to avoid one, contact Ryan R. Cox & Associates LLC to discuss what happened and learn more about your legal options.