Vibration in steering

[Scott 20191668 Bermes <scottb2460@earthlink.net>]

Hey gang,

I am asking this about my mothers Volvo 740 wagon, but here's the
situation. New rotors/pads in the spring. She runs over something wicked
on the road in June, got a flat tire, so it's off to NTW for a new tire.
They balance all four wheels but the vibration is still there. Same
shop,(good and decent shop)advises the RF wheel is bent and need new
wheel. Go to junk yard and get a good condition wheel.  Now, notice
different kind of vibration when braking and more importantly when not
braking and on the highway around 40-50 mph.  Any thoughts?

FYI, I appreicate ALL responses from "hotdogs" no matter if they are
educated guesses or with absolute conviction!  

TIA,

Scott