I agree. Try rotating your tires 1st to see if things change. Sometimes you can get 2 or more wheels with slight imperfections (out of balance and/or out-of-round). When the "heavy" or "high" sides of the tires hit the ground at the same time these small imperfections can work together to make a small problem more noticeable. Then after turning a corner the imperfections become "out of phase" and cancel each other out. If rotating tires changes things, then I'd take it to a tire shop and have them re-balance the tires and check them for an out-of-round condition. Tim