Hi,

My car starts to vibrate at 40mph and it gets annoying at 70mph.

The tires are brand new and balanced, new brake rotors, new cv on drivers side, alignment just done.

Any ideas? Can the wheels have a hop maybe?

It could be a bad tire, however does the steering wheel have any vibration when driving? It'* most likely a bad ball joint or tie rod end.

Before a reputable shop does a wheel alignment, they check ball joints, inner and outter tie rod ends, etc. So I would have them rebalance the tires again. If that doesn't do it then the tire'* belt has most likely slipped and they should replace the tire. There is also a very slim chance that a brake rotor that is not balanced could cause wheel vibration, but I would go with the tires as the problem.

possibly a bent rim??