As Mr. Vroom has pointed out there is more to the story than just the one photo. Bill Koenig who is the US importer for Dymags, pointed out that the wheel has been used for the track over 60 times without the properly checking or the wheel after each track day, we all know how much wear and tear we can put on our cars in a single track day and any wheel going through such conditions would have failed. Bill stated that the crack originated from an engraving on the back of the spoke, previous centers were made from cast magnesium and had a number of different engravings on the back of the wheel including a DYMAG logo, the size and offset of the wheel and its DOT and JWL approval stamps. Currently with the new magnalium centers there are no engravings on the back of the wheel, the centers have also been cut differently with a wider spoke where the center meets the barrel, this is to create a better footprint of the spoke on the barrel as they had found in the past that under very heavy braking the spokes maybe prone to twisting on the rim and could eventually lead to a breakdown of the spoke/rim seal.
These are a few measures have been taken to improve on their previous wheel, the photo of the destroyed dymag wheel is worse than it looks, this is the result of someone carelessly using their car on a track and not a result of a bad product. A similar situation happened to HRE a while back, someone posted a photo of a wheel that was missing a center and said this is an HRE wheel and this is the result of using it on the track, it created a lot of controversy and an apparent ban of HRE's at certain track days if i remember correctly. As usual the reports of breakages have been vastly exaggerated, to date dymag has seen three or four wheels out of sales of over 1,500 wheels and in each case, the car had been driven over curbs on track days and any wheel given such sustained abuse will eventually break. Dymag wheels are actually better than most at withstanding such abuse as testified by the GMG Porsche team in the USA. Having said all of that, Dymag wheels are targeted at high performance vehicles and they are continually improving them to make them as robust as possible, which is one reason that they have switched to the new forged Magnalium center, which is stronger than forged aluminium and does not suffer with corrosion issues.
