Originally Posted by
NeoteriX
I'm not a risk standards guy or anything, but there's a huge difference between comparing the risk between a design flaw that results in actual failure of the part (which is not the case here)...
If you have some evidence that the original design (built with correctly specified tubing) was
ever life cycle tested and its performance satisfied BikeFriday, please bring it forward. Short of such evidence, your assertion that the field failures are not related to an inadequate design is speculative.
The loads and stresses of "safety" bicycles have been studied for ~120 years
and are well defined in the industry. Since this is the second frame crack/break issue & safety recall with the tikit in three and a half years and both problems were discovered by multiple customers, it's clear that BikeFriday did not adequately test their unique design prior to offering it for sale and I am speculating they didn't shock and vibration test it at all.