significantly prejudiced by the late production of Engel’s opinion because of lack of time to prepare to refute the evidence at trial. In addition, the court’s trial calendar would have been disrupted if a continuance became necessary.
Because Trost’s untimely expert disclosure was neither substantially justified nor harmless, it was within the power of the district court to impose sanctions under Rules 16 and 37. While we might well have decided the question of an appropriate sanction differently, we cannot say the district court’s choice of sanctions was an abuse of discretion. We therefore affirm the exclusion of Engel’s opinion on the basis of untimeliness and need not discuss whether his opinion conformed to other Rule 26 requirements or whether there was sufficient foundation for it.
B.
To recover in his products liability suit, Trost must establish that the bicycle was in “a defective condition unreasonably dangerous for its intended use.” Bilotta v. Kelley Co., 346 N.W.2d 616, 623 n. 3 (Minn. 1984) (citing Lee v. Crookston Coca-Cola Bottling Co., 290 Minn. 321, 188 N.W.2d 426, 432 (Minn.1971)); accord Patton v. Newmar Corp., 538 N.W.2d 116, 119 (Minn.1995). Other than Engel’s opinion, the only evidence of defect upon which Trost relied is a res ipsa loquitur type of inference. He argued that the accident would not have happened if the bicycle had not been defective. In Minnesota res ipsa-loquitur alone cannot make out a products liability case. See Cerepak v. Revlon, Inc., 294 Minn. 268, 200 N.W.2d 33, 35-37 (1972). Trost’s account of the accident is not “sufficient proof that the [bicycle] was defective or that it caused the [accident]. [Trost] ha[s] to introduce something more.” Peterson v. Crown Zellerbach Corp., 296 Minn. 438, 209 N.W.2d 922, 924 (1973). Even if a jury were to resolve historical fact disputes in Trost’s favor, there would still be insufficient evidence to support a verdict for him.
Even if Trost could prove that the bicycle was in a defective condition, he would also have to show that it was unreasonably dangerous. See Kallio v. Ford Motor Co., 407 N.W.2d 92, 96 (Minn.1987). The “reasonable care balancing test” is used in Minnesota to determine if a product was designed in a “defective condition unreasonably dangerous for its intended use.” Kallio, 407 N.W.2d at 95; Bilotta, 346 N.W.2d at 621-23. “What constitutes ‘reasonable care’ will, of course, vary with the surrounding circumstances and will involve ‘a balancing of the likelihood of harm, and the gravity of harm if it happens, against the burden of the precaution which would be effective to avoid the harm.’” Holm v. Sponco Mfg., 324 N.W.2d 207, 212 (Minn.1982) (quoting Micallef v. Miehle Co., 39 N.Y.2d 376, 384 N.Y.S.2d 115, 348 N.E.2d 571, 577-78 (N.Y.1976) (citations omitted)). The test is an objective standard “which focuses on the conduct of the manufacturer in evaluating whether its choice of design struck an acceptable balance among several competing factors.” Bilotta, 346 N.W.2d at 622. Trost has produced no information upon which to evaluate the likelihood of harm, the expected gravity of harm, or what precautions could have avoided the harm. He provided no alternative designs to show Trek could have improved the strength of the tube without sacrificing some other important quality. Since Trost did not provide any evidence upon which a jury could evaluate whether the alleged defective condition made the bicycle unreasonably dangerous, the “record taken as a whole could not lead a rational trier of fact to find for [Trost],” and summary judgment was appropriate. Matsushita Elec. Indus. Co. v. Zenith Radio Corp., 475 U.S. 574, 587, 106 S.Ct. 1348, 89 L.Ed.2d 538 (1986).
IV.
In summary, we conclude that the district court did not abuse its discretion in excluding Trost’s expert opinion and did not err in concluding that Trost had not produced sufficient competent evidence to withstand summary judgment. The judgment of the district court is therefore affirmed.