The question before us is whether the district court abused its discretion by rejecting the expert testimony of a polymer scientist regarding the cause of a partiсular tire’s failure. The scientist had no expertise in tire design, manufacture, or malfunction. We find that the district court was within its discretion to limit the polymer scientist’s testimony, and preclude him from testifying as to the cause of the subject tire’s failure. We AFFIRM the district court’s evidentiary ruling and its summary judgment.
I. FACTS
In 2004, Jimmy Smith was driving a 1994 pickup when a rear tire burst, leading tо a collision that caused significant damage. The subject tire was a Load Range E (“LRE”) manufactured by Goodyear. While the tire was seven years old and 25% of its trеad life was worn at the time of the accident, Smith had purchased the tire used just over a year before the accident. He kept it as a spare until, a week before the accident, he mounted it on his truck.
Smith sued Goodyear and several other defendants, alleging that the defective design and/or manufacture of the tire caused its tread to separate, thereby directly causing his accident. To substantiate his claim, Smith retained Dr. Robert B. Moore, a polymеr scientist, to testify that the tire’s design or manufacture was faulty. Moore had never worked in or studied the tire industry in any capacity, nor had he ever testified as a tire expert. Indeed, he did not claim to be a tire expert. He stated that his expertise was limited exclusively to the study of polymers and their adhesive properties. Having done a brief “touch and feel” test of the tire and some internet research involving tires, Moore concluded that the tire’s tread separated due to “improper bonding of the rubber skim layer to the steel belts,” which could have been avoided with the addition of a “nylon cap overlay.” He basеd this conclusion almost entirely on one article he found during several hours of online research. See J.W. Daws, Failure Analysis of Tire Tread Separations, 3 Prac. Failure Analysis 73 (October, 2003).
Goodyear moved to strike Moore’s testimony. While the distriсt court would have allowed Moore to offer testimony regarding polymer fibers and their adhesive properties, insofar as that became relevаnt, it would not allow Moore to give any testimony regarding (1) the cause of the tire’s failure, and (2) the proper design or manufacture of tires generally. Following thаt ruling, Goodyear moved for summary judgment and its motion was granted.
II. DISCUSSION
Smith appeals the court’s order to limit Moore’s testimony. Smith also argues that, Moore’s testimony aside, there was a genuine issue of material fact sufficient to survive summary judgment.
A. Was Moore’s Testimony Properly Limited?
The exclusion of expert testimony is reviewed for an abuse of discretion.
See Gen. Elec. Co. v. Joiner,
When evaluating expert testimony, the overarching concern is whether or not it is relevant and reliable.
See Daubert v. Merrell Dow Pharm., Inc.,
Moore is not a tire expert. He has never been employed in any capacity dealing with the design or manufacture of tires. He has never published any articles regarding tires nor has he ever еxamined a tire professionally prior to this litigation. His only experience with tires is as a consumer.
Cf. Hammond v. Coleman Co., Inc.,
Nonetheless, Smith insists that “[a] tire is simply an application of the fundamental issues of polymer science.” That is true in some sense, just as it is truе that asbestos, heart valves, and cupcakes can all be broken down into their basic atomic particles; but that does not mean an atomic physicist is qualified to testify regarding any asbestosis, medical malpractice, or confectionary issue. It’s the science’s application to tires that сoncerns us here, and Moore has absolutely no experience applying polymer science to tires.
The relevant question in this case is whether
this tire’s
failure was a result of a manufacturе or design defect, as Smith claims, or of abuse and misuse of the tire, as Goodyear claims.
See Kumho Tire Co., Ltd. v. Carmichael,
The district court was well within its discretion to exclude Moore’s testimony regаrding the cause of the tire’s failure.
B. Absent Moore’s Testimony, Did a Genuine Issue of Material Fact Remain?
Moore’s testimony aside, Smith argues that the district court errеd in finding
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that there was no genuine issue of material fact sufficient to survive summary judgment. We review that determination
de novo. Matsushita Elec. Indus. Co. v. Zenith Radio Corp.,
Under the Mississippi Products Liability Act, applicable because this is a diversity action, Smith must show that, (1) the tire was defective at the time it left the control of the manufacturer or seller; (2) the defective condition rendered the product unreasonably dangerous to the consumer; and (3) the defective and unreasonably dangerous condition of the product proximаtely caused the damages for which recovery is sought. Miss.Code Ann. § 11-1 — 63(a);
see also Austin v. Will-Burt Co.,
Even if we assume the subject tire was defective and unreasonably dangerous when it left Goоdyear’s control,
3
we find no proof of proximate cause in the record. Smith has not shown that, seven years after the tire left Goodyear’s control, the failure of his tire resulted from a manufacturing and/or design defect. Under Mississippi law, “the burden of proving that when the accident occurred there had been nо substantial change in the condition in which the product left the manufacturer is upon the plaintiff.”
BFGoodrich, Inc. v. Taylor,
Without Moore’s testimony as to causation, which was properly excluded, we agree with the district court. Goodyear’s expert testimony, that the failure wаs caused by underinflation or overloading, is essentially uncontroverted. The grant of summary judgment was proper.
III. CONCLUSION
We AFFIRM the district court’s eviden-tiary ruling and its grant of summary judgment.
Notes
. Moore presumably was unfamiliar with the existence of nylon cap overlays in tires until he read the Daws article, 3 Prac. Failure Analysis 73, but his background in polymer science probably qualified him to talk about how nylon overlays might affect the bonding of a tire’s components. Accordingly, the district court’s ruling would have allowed him to testify to that extent.
. While Moore added that his "inspection did not reveal any defects that could be caused by use and abuse of the tire over time,” we hаve already discussed why he was unqualified to render that opinion.
. Smith offered documents from the National Highway Traffic Safety Administration (NHTSA) regarding an investigation of LRE tirеs to substantiate his claim that the model was defective. While the district court excluded those documents, we do not address whether that ruling was proper beсause the NHTSA documents alone would not save this case from summary judgment. Even if those documents were admissible to show that LRE tires generally are defective, Smith still presented no admissible evidence suggesting that this particular tire’s failure in this instance was due to such a defect.
