Hi,

couple of things to check.
check the glue on the tyres it might be that the tyre is balloning off the rim and this is caouseing the vibration.

check the bearing is in the hubs they can break and shatter. if they are broken you won't see the vibration with the wheels off as there is no load. you will with the wheels on though.

cvd can bind but mainly this couses chetter in the front only. check the centres of the cvs for wear and the pins