The Wheel
A truck loses a wheel beside Yuki’s carpool. Jen looks at the service work that came before it.
Explore the real law behind this episodeTranscript
TSLYuki drove the carpool. Two kids, three neighbors' kids, one very used SUV.
Tom BriggsA wheel came off. Freak thing. Nobody could've predicted it.
JenThe lug nuts were never torqued right after the last service. There's a re-torque check that's supposed to catch exactly this. Nobody did it.
TSLA wheel doesn't fall off a truck that's been maintained. It falls off one that wasn't.
YukiA tire - the whole tire - passed my window like it had somewhere to be. The kids thought it was awesome. I did not.
TSLShe kept five kids safe with both hands on the wheel. Somebody lost one of theirs.
The Wheel: Service Work and Loose Fasteners
A truck wheel passes Yuki’s carpool. The episode traces the separation to earlier service and asks whether the assembly was secured correctly.
Examine the assembly, not only the tire
49 CFR 393.205 addresses wheel and rim condition and missing or loose nuts and bolts. 49 CFR 396.3 addresses covered maintenance duties.
Wheel separation differs from shedding tread. Fasteners, studs, bearings, or other components may be involved. The absolute line about maintained trucks should not replace examination of the failure.
Reconstruct the service and follow-up
Work orders, technician notes, torque procedures, parts, tool records, and manufacturer instructions help evaluate service. If a follow-up torque check is alleged, identify the relevant procedure and whether it was performed.
The story does not establish one re-torque interval for every wheel. Preserve the hub, studs, nuts, and recovered wheel so an examiner can assess wear and fractures before alteration. Record which parts were recovered from which location.
Connect separation to the collision
Video, witnesses, marks, and recovery locations help trace the wheel. Identify the source truck and wheel position. Recent repair can be important without proving the repairer caused separation; maintenance, use, and causation must be considered together.
Questions this episode raises
- Does separation prove who made the mistake?
- No. Components, service work, and operating history must be investigated.
- Is there one re-torque schedule for all wheels?
- No. Identify the relevant manufacturer and service procedures for the actual assembly.
Sources and further reading
- 49 CFR 393.205: Wheels, rims, nuts, and bolts
- 49 CFR 396.3: inspection, repair, and maintenance
- 49 CFR 392.7: Equipment inspection before driving
Episode explanation by Impact Legal. Updated .