There can be a number of reasons, including, but not limited to out of round tires, tires out of balance, bent rim, worn or damaged suspension components, and so on. Take you car to a mechanic you can trust and have them diagnose the problem.
Tires and/or wheels may be out of balance
Your car needs an alignment. Typically around $100 or less.
Higher g's produced at higher speeds are harder to survive.
Parts tend to loosen up in the car, and like anything else when cruising at fast speeds it intensifies the motion, hence the vibration.
Because at higher speeds you have more velocity than at lower speeds transferring more energy to make a bigger crashing causing more damage.
Are you car wheels all balanced properly? If not, an out of balance wheel can start to vibrate at certain speeds.
yes
Cars vibrate.
cv axle The rear brake drums may be out of round also.
A tire not properly balanced. ------------------------------------ Are you car wheels all balanced properly? If not, an out of balance wheel can start to vibrate at certain speeds.
could be a blockage in your fuel lines.
Could be wheel balance.