Used Commercial Tire Inspection

Identify every tire before grading

Record brand, model, complete size, load range, service description, DOT identification, retread markings, quantity, and intended sale category. Do not grade a mixed stack from the top tire alone. Separate new take-offs, used tires, retreads, casings, repairable inventory, and scrap candidates. Photograph the identification on each tire or each clearly controlled batch. If a marking is unreadable or the tire cannot be traced to a reliable inspection record, disclose that limitation rather than filling the gap with an estimate.

Measure tread across the full face

Measure tread depth at multiple grooves and positions with a suitable gauge. Record the lowest meaningful reading and the pattern across inner, center, and outer ribs. Look for shoulder wear, center wear, feathering, cupping, flat spotting, river wear, diagonal wear, heel-and-toe wear, and evidence of a mechanical or inflation problem. A single center reading does not describe usable condition. State the units and provide a photo of the gauge in the groove without overstating measurement precision.

Inspect casing, liner, bead, and sidewall

Examine both sidewalls, the inner liner, crown, shoulders, and bead area under suitable light. Look for exposed cords, bulges, separations, impact breaks, run-flat evidence, cracking, contamination, damaged beads, liner wrinkles, excessive abrasion, and prior repair material. Commercial casings require trained inspection and may need specialized equipment before retread or service. A marketplace visual review cannot establish that a tire is serviceable, so final acceptance belongs with a qualified tire professional.

Document every repair

Identify repair location, type, quantity, workmanship, and whether the tire is being sold for service, further evaluation, retread, or casing use. Do not hide a repair under dirt or photograph only the tread face. Repair eligibility depends on damage, tire type, location, size, operating history, manufacturer guidance, and industry procedures. When the history is unknown, say so. Buyers should make the transaction contingent on physical inspection when repair documentation is incomplete.

Evaluate age and operating history

DOT age is one risk indicator. Heat, overload, underinflation, road hazards, storage, chemicals, repeated repairs, and previous service can matter as much as calendar time. Ask where the tire came from, why it was removed, whether it ran in a dual assembly, whether it has been retreaded, and how it was stored. Avoid universal age claims; consult the applicable tire, vehicle, fleet, and retreader guidance for the intended service.

Create a defensible condition record

A professional listing states whether the tire is used, retread, take-off, casing, repairable, or scrap; gives measured tread readings; shows both sidewalls, tread, liner, bead, DOT, and repairs; and explains price, quantity, location, inspection rights, and warranty status. Use neutral language such as 'submitted condition' or 'inspection required' where appropriate. Never use 'safe,' 'like new,' or 'road ready' without a supportable inspection and clear responsibility.

Sources and further reading

These primary and authoritative resources support the manual's research. Always use the current vehicle, tire, manufacturer, and regulatory guidance for a specific decision.

• Tire Safety Ratings and Awareness (TireWise)National Highway Traffic Safety Administration
• 49 CFR 393.75 - TiresElectronic Code of Federal Regulations
• Commercial Tire Safety TipsFederal Motor Carrier Safety Administration