Install them to spec.........that's a novel idea. I think the op's point was that despite his expertise he experienced this repeated failure. So what can we conclude? Here's some possibilities:
1. Failure occurs no matter what you do as long as you are big and strong; or
2. If you install them properly and check them they won't fail;
Option 1. Assumes shimano is incapable of designing and testing critical load characteristics.
Option 2. Assumes the Op despite his assurances did not install them or check them correctly.
So........which is it?
Hi goodboyr/TrekUK, interesting/amazing replies
My interpretation is that the spider can be faulty and that Shimano will most likely correct the issue in time, just like Shimano fixed the issue with the 6700 chain when it was initially released where link breakages occurred.
When the 6700 chains encountered link breakages I don't remember there being any recalls...
Hi 4914, thank you for letting us all know of this issue with the DA 11spd cassette spider
It does sound a little dangerous, so it is fortunate that noone has been injured todate