Short and simple, I put my 17's back on for summer the other night and there is a strange, barely audible knock coming from (I think) the left front wheel area, and it is mainly there when braking. Free rolling in neutral I can't hear it at all, turning or not. First I freaked and thought it may be a CV Joint, but it sounds more of a braking system knock. Is it possible maybe that rim is just sitting a little crooked?

This is also the first time I've driven the car in a month, it's been a garage baby most of the winter.