2015 Hyundai Elantra - Vibration

Maintenance/Repairs
1

when driving speeding above 80 kmh there is vibration, i went to the garage they said it’s axle issue, they removed and put grease inside the axle, but still the same issue.
please give some advise

Note: axle is OK, wheel alignment is OK, brand new tires,

2

We are all wondering if the tires have been checked for balance and have been removed from the rims and rotated. Even new tires can have defects of problems.