Take a wire coat hangar and try to pull it apart. You can’t. Now take the same wire coat hangar and bend it back and forth quickly at one point. After just a few minutes you will break the coat hangar. It could have been the same way with the fender.

Another failure point is the fasteners that hold the fenders in place. Fasteners can become loose due to repeated vibration. Usually a mechanical device (lockwasher, self-locking nut) or a thread locking compound is used to prevent this. If during the installation of the light, a mechanical device wasn’t put back or if there was thread locking compound that wasn’t replaced, this could have lead to the failure.

I am curious about one thing. What was his speed at the time of incident? Could excessive speed have influenced the severity of his injuries?

The Plaintiffs also presented evidence that Pacific Cycle imports over a million bicycles a year in the U.S. from manufacturing plants in Taiwan and China, making them the largest importers of bicycles into the U.S. The Plaintiffs presented evidence that Pacific Cycle had no independent engineering or testing departments to check the safety and quality of their bikes. Testimony was that the bike frame and fork was manufactured by a plant in China, which Pacific Cycle claimed did safety testing and quality control, but Pacific Cycle was unable to present any documentation to support that claim. The fender and fender bracket were manufactured by a different vendor also in China, but Pacific Cycle was unable to even identify the specific vendor who had manufactured the fender and fender bracket, and thus, was unable to present any documentation showing that there was any safety testing or quality control done with regard to the manufacturing of the fender bracket. Evidence was also presented by the Plaintiffs that although Pacific Cycle imports approximately 200 different models of bikes into the U.S. market, they have one generic manual, which is placed in the box in the Chinese and Taiwan plants, and that manual showed two L brackets in the fender diagram, as opposed to a
single bracket, which was on the bike the Plaintiff was riding, and that
the manual contained no information regarding assembling or tightening of the fender stays on the bike, which the Pacific Cycle expert, David Mitchell, claimed may have not been properly tightened by the Plaintiff when he put the fender on the bike after receiving it from Wonderful Creations, and may have contributed to the accident.

Here’s what appears to have happened: The plaintiff bought a bike from Pacific Cycle and then retro-fitted it with a small, 48 cc motor he bought from Wonderful Creations on eBay.

The motor mounts in the “vee” of the bike frame and also has the ability to have a small generator attached to it to power a lighting system that mounts on the fenders.

The plaintiff had to removed the fender to put on the light kit. (The light kit is the only thing that I can find that Wonderful Creations sells that mounts on a fender / fender bracket.) The motor adds more vibration and stress to the frame of the bike and if the fender is not mounted and tightened correctly, that vibration can be transmitted to the fender bracket causing metal fatigue failure on the bracket holding the fender and the added light.

Or the bracket could have been designed not to hold the weight of the fender, much less the fender and light plus the vibration from the motor.

Sure – if it was mounted on the seat.

“”And the motor wouldn’t be driving the front wheel, but the back one. The front wheel has no chain.”

And this is known how? back in the ’60s, there was a French made (I seem to recollect) bicycle with front fender mounted engine that drove the front wheel via an idler wheel.

As to the commenter who opined “Perhaps the jury did the right thing,” it doesn’t seem likely in this case. The injuries seem relatively minor as reported (i broke shoulder and wrist in a skateboard crash at maybe 20mph – oh yeah that was pretty bad – but not a million bucks bad) and unless the plaintiff was a bottom rung wage earner he plainly was not disabled by this injury for too very long.

A bicycle motor would be virtually insignificant, weight-wise, compared to an adult human for which a bike would be designed.

And the motor wouldn’t be driving the front wheel, but the back one. The front wheel has no chain.

So I think it’s fair to say that the article is missing more than a few critical details. Which is why drawing conclusions about trials from snippets read in the press is often a big problem.