I can say this. I was talking to Allen a few weeks ago about his rims that broke. So far it has only showed up on a few skinny rims, but the problem is in the quality of the rim itself. It will show up in the wider rims sooner or later. They are using cold forged rims from China and then welding the centers in place. You need to forge aluminum warm or hot. They are cracking on the radius that is forged into the rim. This same radius is on every rim. The skinnies are supporting more weight, so they weaken first. The crack runs with the grain of the rim, so it is not going to go away, unless they went to a different temperature forging process. We talked about this for a while. I am a mold design engineer and Allen is an engineer of another kind too. We have a little knowledge of why its happening...and enough knowledge to know its not done happening.
