Have a set of 18" Rondels on Yum

The other week had a lot of wheel wobble from front, so poped into Kwik Fit last sunday. They checked the front wheels and said that it need 100grm on both front wheels. So that got done

Moved the front whhels to the back and checked the back wheels they only need about 30grm so they went on front. Drove home and parked cossie in the garage.

On Thursday night drove to Newcastle to have some work done on YUM it was really noisy from the rear about 90mph so took it easy.

On the sat night after checking both props desided to move the rears to front and fronts to rear.

All the rear noise stopped but got the shakes at 70mph so take it its got to do with the 2 rondles with 100grm weight.

Can they be put right?? so they dont have to have so much weight added or is this time to try and get 2 more rondels (as if im going to only get 2) or time to have new wheels

Anyone got any idea and also what type of wheels next


Thanks

Dave