If the shake is constant then yes it could be tires. If the shake gets better or worse when giving gas or letting off, then it is more likely in the drivetrain.
ANOTHER ANSWERWORN tires are typically less of a problem than are "out of balance" tires or bent wheels. Another possibility would be something called a "slipped belt". That often occurs either when the tire is new or when the tread has worn through and the belt is showing. Today's radial tires have a belt under the tread that stabilizes the tire and helps it last longer. Once the belt is exposed it starts to degrade and can separate from the rest of the tire, slipping to one side. That will cause quite a bit of vibration.Regarding the possibility that it might be drive-train, I'd be more willing to suspect drive train if it started at a lower speed. I'd need to ride in it to know for certain. A higher frequency vibration is more likely drive train while a lower frequency is more likely a bent wheel, out of balance tire or a slipped belt.
tires need to be rebalanced
check c v shafts most common on Chrysler products but wil happen on all front wheel drive cars
Tires are out of balance
A ten second car could hit 60mph in under 10 seconds no problem. It could probably do it even if it had four flat tires and was pushing a dumpster.
You have a tire out of balance. Have all 4 tires balanced and rotated. If it still shakes have the motor mounts inspected.
it could be, its an easy fix, you just have to balance your tires
depends on when it shakes if it shakes when you put on the brakes-warped rotors otherwise it could be ball joints, steering joints, wheel bearings or even out of balance tires
if it shakes while your braking your front roters could be warped or if it shakes while your driving try balancing the tires at a tire shop.
Perhaps tires need balancing
Tires need ballanced!!!
Mine doesn't, but if yours does, it could be due to warped rotor (if it shakes when you are breaking) or unbalanced/unevenly worn tires. Could also be a broken or missing engine mount (if it shakes all the time).
Go to a tire shop and see if your tires are balanced correctly, if your tires are out of balance they could cause vibrations at highway speeds.