I've noticed when traveling on level surfaces like the street, when I get up some speed
the rear tires almost seem like they're not completely round. They don't vibrate but they
act like one side of the tire is heavier than another. It doesn't seem like it's a result
of the low tire pressure atvs require, but what do I know. Anyone else have this problem?
Is this normal? Thanks

 

I always have my tires balanced just for good measure and they don't charge me very much. I have found that if you balance they do not wear down as fast.