j30t vibrating vigorously at 140 km/h on highway?

[emdeee]

Hey guys,

I just changed my wheels and tires from the stock wheels with 215/65/15 winter tires to a new set of 17x8 wheels with 235/45/17 tires and the car was vibrating like MAD CRAZY on the highway starting from 130 km/h onwards.

when I hit 140km/h it was just too crazy so I had to slow down. On my winter tires it was totally cool, I have hit 200 km/h and it would run smooth like a Benz.

I was thinking maybe the wheels aren't balanced properly, but anyone got any other ideas?

Thanks

[gr8scott72]

Don't make a big problem out of nothing. One set of wheels work, the other shakes, wheels need balancing. Start there, your problem should go away.