Published by J.A. Davis & Associates – San Antonio Personal Injury Lawyers – Truck Accident Lawyers

Hot Weather and Tire Failure in 18-Wheeler Wrecks

Our team of truck wreck attorneys in San Antonio has seen firsthand how South Texas summers create lethal conditions on Interstate 35, Loop 410, and US-90. When pavement temperatures top 150°F in July and August, the physics inside a commercial tire turn hostile. Underinflated rubber flexes with every rotation, building internal heat faster than it can dissipate — and when a tread separates or a sidewall ruptures on an 80,000-pound semi, the truck accident that follows can be catastrophic. NHTSA recognizes tire failure as a leading mechanical cause of large-truck crashes nationally, and Bexar County’s sun-baked roads compound that risk every summer. If you were hurt in a truck tire blowout accident, understanding what happened — and why someone is legally responsible — is the first step toward recovering what you have lost.

Federal safety data and TxDOT crash records confirm that commercial vehicle collisions on Texas roads spike during the hottest months. Heat is not just an environmental backdrop; it is an active mechanical stressor. A tire that passes a morning pre-trip inspection at 75°F can reach critical failure pressure thresholds within hours of rolling down sun-soaked asphalt. Retreaded tires — common on drive axles and trailer axles because they reduce fleet costs — are especially vulnerable: if the bonding layer between the retread cap and the casing degrades, the cap peels away at highway speed. That peeled rubber, scattered across two lanes, becomes what truck drivers call a “road gator” — a blowout hazard for every driver who follows. A San Antonio truck accident victim injured by debris from a prior tire separation faces the same negligence principles as one struck by the truck directly.

Three mechanical conditions combine to turn hot weather into a truck tire blowout accident waiting to happen. First, underinflation is the primary culprit: an 18-wheeler steer tire specified at 110 psi loses roughly 1 psi for every 10°F drop in overnight temperature, so a driver who inflates to spec at dawn may be rolling underinflated by midday — each rotation flexing the sidewall excessively and generating heat from within. Second, worn tread depth reduces the tire’s ability to shed heat and grip wet pavement during the afternoon thunderstorms common in San Antonio. Third, overloading — exceeding the tire’s rated load capacity — compresses the rubber beyond design limits, accelerating heat buildup on grades like those along I-10 west of the city. Any one of these conditions is dangerous; all three together make a catastrophic big-rig crash nearly inevitable.

Federal Inspection Duties Carriers Cannot Ignore

The Federal Motor Carrier Safety Administration does not leave tire maintenance to chance. Under 49 CFR Part 396 — the FMCSA’s systematic inspection, repair, and maintenance regulations — every carrier must ensure tires are free of defects before a vehicle goes into service. Part 393 specifies minimum tread depth (4/32 inch on steer tires; 2/32 inch on other positions), prohibits operation on tires with exposed fabric, cuts, or bulges, and requires that inflation pressure be maintained at the level marked on the tire sidewall. Drivers must complete a Driver Vehicle Inspection Report (DVIR) at the end of every day and inspect the vehicle at the start of the next shift. A carrier that dispatches a truck with a cracked sidewall, low inflation, or a retreaded tire showing belt separation has violated federal law — and that violation is direct evidence of negligence in a truck accident lawsuit.

Carriers are also responsible for the maintenance schedules performed by their shop or a contracted tire vendor. If inspection records show that a tire was flagged but not replaced, or that no inspection occurred at all, that paper trail becomes powerful evidence. Demand the DVIR logs, maintenance records, and any tire vendor invoices early — before a carrier’s legal team has the opportunity to claim they were lost or overwritten.

How a Blowout Triggers Loss of Control and Jackknife

When a steer-axle tire fails on a loaded 18-wheeler, the driver loses steering input almost instantly. The truck pulls hard toward the blowout side, and at highway speed, overcorrection is nearly automatic. A trailer that begins to swing wide past 15 degrees relative to the cab can jackknife — the trailer swinging 90 degrees or more, sweeping across multiple lanes. Vehicles alongside or behind the big rig have no time to react. Collisions in these scenarios frequently involve multiple cars, rollovers, and severe injuries: traumatic brain injuries, spinal cord damage, and crush injuries from the trailer’s steel underride. The violence of an 18-wheeler collision caused by tread separation is not comparable to a rear-end fender-bender; these wrecks change lives permanently.

Carrier Liability vs. Tire Manufacturer Liability

Two distinct legal theories often apply after a truck tire blowout accident. The first is carrier negligence: the trucking company failed to inspect, maintain, or replace a tire it knew or should have known was defective. The second is product liability: the tire itself was defective in design or manufacturing, independent of how the carrier maintained it. Tread separation caused by improper bonding during retreading can support a claim against the retreading facility. A sidewall failure caused by a manufacturing flaw in a name-brand tire may support a claim against the original tire maker under Texas strict liability law. Both theories can run simultaneously, and identifying which applies — or whether both do — requires a rapid investigation before critical evidence disappears.

Preserve the Failed Tire — It Is Evidence

The physical tire that failed is the single most important piece of evidence in a truck tire blowout crash. Carriers and their insurers know this. Adjusters are often on scene within hours, and without a legal hold, failed tires are routinely discarded, returned to vendors, or destroyed. Once a San Antonio truck wreck attorney sends a spoliation letter — a formal demand to preserve all physical evidence — the carrier is legally obligated to retain every tire on the vehicle, the DVIR records, and any video from the truck’s forward-facing cameras. Acting fast matters. Evidence that existed the morning after the crash may be gone within a week.

Victims and their families should also photograph the crash scene, the tire debris, and any road markings. If emergency responders or law enforcement took statements, request copies of those reports through TxDOT or the investigating agency. Keep records of every medical visit from the day of the commercial vehicle collision forward.

What to Do After a Truck Tire Blowout Crash in San Antonio

• Seek medical care immediately, even if injuries seem minor — internal trauma from high-impact collisions often presents hours later.
• Contact a truck accident attorney before speaking with the carrier’s insurance company — adjusters gather statements to limit payouts, not to help you.
• Do not sign any release or accept any settlement offer until you understand the full extent of your injuries and losses.
• Ask your attorney to send a spoliation letter to the carrier within 24–48 hours to freeze the failed tire, black-box data, and driver logs.
• Document your losses: wage statements, medical bills, prescription receipts, and records of everyday tasks you can no longer perform.

Talk to J.A. Davis & Associates About Your Case

J.A. Davis & Associates, LLP has represented truck crash victims in San Antonio and across Bexar County since 1999. Our San Antonio truck accident attorneys know how to hold carriers accountable under federal safety regulations, how to work with tire failure engineers, and how to build cases that reflect the full cost of a serious wreck — medical care, lost income, pain, and the disruption to your family’s life. We work on contingency: you pay nothing unless we recover for you.

If you or someone you love was hurt in an 18-wheeler tire blowout crash in San Antonio or the surrounding area, call J.A. Davis & Associates, LLP at (210) 732-1062 for a free, no-obligation consultation. There is no cost to talk with us, and waiting costs you evidence you cannot get back.