My vios 2011 change to 16 inch rims with tyre 16/185/55,after I change it everytime when I drive more than 130 kmh the car will be very unstable like the front of the car is shaking.i had went to Toyota for balancing but it still remain the same problem,may I know any sifu here know what's the problem?or any guys having the same problem?pls help,I have no idea what to do.

no center cone of coz vibrate la. aftermarket rim center hold is bigger than ur stock rim. Just put a set of center cone will solve ur problem

15" ok what...why want to change to 16"   

Every Rims have different center hole size... Maybe u are lucky to get 1 that fit yours nicely or maybe the vibration is very minimal for u to feel it...... My Wira experienced car vibrating problem also when I first install... After installing center cone, problem solved... And yes, tires will cause same prob also, but I assume TS 1 is new tires coz his rims also new, so possibilities for it to have problem is lower... That's why we suggest TS try to fit in center cone 1st... And other thing, tires is not directly stall on a car... It is stall on a rim, rim stall on knuckles, knuckles need  drive shaft and bearings to spin it, and so on... Therefore, a lot of parts that can cause a car vibrate... Just that other parts faulty don't spoil so easily, and moreover it is a Toyota... And lastly, RM 60 for a set of center cone considered expensive?!