A damaged truck tire, wheel, rim, hub, or fastener can be evidence of a condition that preceded a collision, a consequence of the impact, or both. The distinction depends on the exact wheel position, component history, physical fracture and wear evidence, inflation and load records, roadway contacts, vehicle movement, and post-crash handling.

A tire or wheel failure theory should identify the exact wheel position, component, pre-impact condition, service history, load, inflation, roadway event, failure sequence, and physical evidence instead of relying on post-crash appearance alone.

Preserve the assembly before dismounting or repair

  • Tractor or trailer VIN, unit number, axle, left or right side, inner or outer dual position, steering or non-steering position, and direction of rotation
  • Tire brand, model, size, load range, identification number, manufacture date code, retread markings, casing history, repairs, tread depths, pressure, and valve condition
  • Wheel and rim manufacturer, size, part number, markings, cracks, deformation, bolt-hole condition, nuts, bolts, studs, hub, bearings, spacers, and mating surfaces
  • Undisturbed photographs, video, scans, measurements, fragments, tread or belt pieces, road marks, contact damage, heat evidence, and storage environment
  • Removal method, tool marks, who handled each item, packaging, transfers, examinations, testing, and any destructive work

Apply the tire rule to the correct position and condition

49 C.F.R. § 393.75 addresses conditions such as exposed ply or belt material, tread or sidewall separation, flats, audible leaks, specified cuts, tread-groove depth, restrictions on certain regrooved or retreaded tires, loading, speed restrictions, and inflation. Several provisions differ for front-wheel and other tire positions.

A post-crash pressure reading may not establish cold inflation before the event. Heat, air loss, bead unseating, impact puncture, valve damage, fire, towing, time, temperature, measurement method, load, and dual-tire interaction should be documented.

Inspect wheels, rims, and fasteners separately

49 C.F.R. § 393.205 states that wheels and rims must not be cracked or broken, wheel stud or bolt holes must not be elongated, and nuts or bolts must not be missing or loose. Those questions are distinct from tire tread, casing, inflation, and loading.

  • Determine whether fasteners loosened over time, fractured during the event, were removed later, or were never recovered
  • Document fracture surfaces, fretting, corrosion, elongation, thread condition, torque evidence, witness marks, and component compatibility
  • Compare the assembly with installation procedures, service bulletins, recalls, inspection criteria, torque records, retorque practices, and prior complaints
  • Identify tire seller, installer, retreader, repairer, maintenance provider, carrier, owner, lessor, and anyone who inspected or controlled the assembly
  • Keep a component-level chronology rather than assigning one company every act involving the vehicle

Trace inspection and maintenance records

49 C.F.R. § 396.3 requires systematic inspection, repair, and maintenance of covered vehicles and identifies required vehicle records and a retention period. The current text expressly includes wheels and rims among parts that may affect safe operation.

Request the native maintenance system, work orders, inspection sheets, driver reports, roadside and annual inspections, tire inventory, casing and retread records, pressure or monitoring data, purchase invoices, mileage, rotations, alignments, repairs, photographs, and technician notes. A summary printout may omit attachments, status changes, measurements, and audit history.

Reconstruct the failure sequence

  • Vehicle speed, load, axle weight, tire rating, inflation, temperature, road condition, curve, grade, steering, braking, and prior vibration or warning
  • First physical event, tire or wheel separation, loss of control, roadway contact, collision contact, fire, and later damage
  • Electronic data, video, witness observations, debris distribution, scrape and gouge evidence, wheel marks, and component location
  • Competing explanations such as road hazard, collision loading, bearing or hub issue, improper mounting, underinflation, overloading, age, repair, or maintenance
  • Qualified opinion, inspected items, method, limitations, missing evidence, and whether destructive testing is proposed

The related motor-carrier safety-system guide places equipment inspections and repairs within the carrier’s broader reporting, dispatch, training, enforcement, and record processes.

Rosensteel Fleishman Car Accident & Injury Lawyers provides information about North Carolina truck-accident claims involving tire and wheel evidence. A component condition must be linked to a supported event sequence and collision consequence.

Sources