not exacty sure how one could take a chuck out of a flywheel. the rim problem, i would recamend getting a whole new set of rims and tires cus the tires you have are preglued to the rim. i would be a bad idea to take the tire off the rim. come to think of it, how big were the jumps you were taking your truck off. i mean, how high was it going? that had to be extremely high. ive hit a rock at whatever the top speed on the sv is and didnt break a rim.