I think Mario hit it with this one. The few times my car has lost it with water the rear broke first then the fronts would lose it as I was trying to compensate. It was worse with the Avon tires and improved significantly using the Blockley or Excelsior line. Swapping out the rear for something "better" was hopeless as there is simply not enough weight back there to really plant it down.
I have learned to avoid wet conditions at all times. Aside from the thrill of sliding around the sheer misery in the cockpit has made me a believer in good weather apps for the phone!
