I have a '93 GS300 with a bad vibration from 70-80MPH. It doesn't need balancing cause the rims and tires are brand new. Just got an alignment. Is it the tires? Nitto NT555. or is there something else wrong with it? or is this normal? Tires are 245/35/19. Thanks.

minh

 

Check and see if your centering rings were installed or the correct size.

 

is there a rotor bend ???!!!

or just dirt.. when you replace pads, the calip. need to be washcleaned ,
end up with vibrations... weird hé but it is true.

small thing with disasterous consequences..

 

Try rebalancing the tires with the Hunter balancing machine that has the roller. It presses against the tire and measures the contact force . Regular balancing machines can't detect some kinds of inbalances of the wheel/tire.