Hi everyone. Recently got a Sportage 1.6t awd gt line and it's great. We got the car then next day took it to kia for it's service. They picked up that there is a 3mm difference between front and rear tyres and the wheels need rebalancing. They have said that for the AWD system to work properly and safely that the tyres need to be within 2mm difference. Would this be cause enough for the car to vibrate doing speeds of over 60mph? Thanks.