Is your car midium or compact size? Does the vibration stop when the speed is lower or higher than 110km/h? If so, you just need to avoid this speed, probably there is nothing can be fixed.
there is no vibration when the speed is lower, it gets more vibration if the speed is higher. I just noticed it after I put my snow tires on a few days ago.
My car, a full size, gets vibration at a range of ~10km/h around 125km/h at max. It goes away when the speed gets lower or higher. But your case is not the same.
there is no vibration when the speed is lower, it gets more vibration if the speed is higher. I just noticed it after I put my snow tires on a few days ago.