i was just wondering if anyone could help me find the cause of my shaking steering wheel (starts around 65-75, stops when i hit about 90). The rims are brand new and balanced, it was just aligned yesterday, and both axles should be good. one was jsut replaced but other has recent rip in cv boot. any ideas?

oh yeah, i have 5 zigen rims and i dont have those cetric rings or whatever, do i need them?