Good idea Jinster, i'll keep that one in mind for the future. I was able to get the bolt out with a vice grips. After soakin overnite in PB Blaster it came loose. Now the rings will be stored in a safe place until my rotors go bad again. I really liked the no ABS I had all winter, It made me a safer driver without it. I couldnt stand the ABS. But, In the back of my mind I know I should have it on there....Thanks to all who responded. This thread is done.