Hey guys, I just went to the garage to replaced my winter tires for slightly used 4 season tires and everything is good except when i'm going 95-100km/h + my steering moves ( little left to right movement). After noticing that, I thought they weren't well balanced so I went back to the garage but in fact they were fine. My friend that worked at the garage told me it might be because the front tires aren't on the good side so we switched them but did not help. The tires seems to be in good condition (no difformation) and when I had my winter tires i never felt this steering movements when I drove 100km/h + so I doubt it may be caused by a disfunctional part of my car. Also, I switch the original 225/60-16 for 215/60-16 but I doubt this change could have create this steering (vibration). Altought, I don't feel my car vibrating when I'm driving 100km/h so it make this problem even weirder. Anyone have an idea what could have cause that steering movements (vibration)?