I saw this post from a FB page. According to the user it seems that the tire is a little tensile and gristly that it resulted from the photos below. I haven't used Corsa on my Suzuki skydive but rather FDR as my Brand. If this is true that after the Rider hits a pothole this crack happens to the Corsa Tire.
It's a Corsa S33. I'm still wondering now, since I'll be changing shoes soon for my Scooter. It would be better to stay FDR forever.... Forget the price as long as you are safe.... I lean more on the FDR....