[sphanna]

To answer a few questions: I do not drive aggressively and I keep the lug nuts torqued to 50 #. I have mech brakes with "Flat Head Ted" and cast iron drums. The outer edge of the center part is in tight contact with the drum. When I ordered different wheels, last
Fall, I just purchased the rims out right and allowed the vender to pick out good wheels and powder coat to match. When I received the new wheels , I sent two raw good wheels to serve as cores. The wheels I traded in were very good wheels. The ones. I received were appearing good but not as smooth as the ones I sent him. They were acceptable to me but a few months later, I found the cracks. I don't know when they cracked but was within the last few months with the newly purchased wheels.