Tire hop or vibration. 85 buick le sabre the car has 137k original miles. I just. Replaced front and rear shocks and still feels un safe

85 buick has sudden vibratibv"

Have the tire checked at any tire shop. The tire may have a belt that broke loose.

Yosemite

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Could also be that the bad old suspension got the tires good and cupped.

Tire balance, bad tire, worn suspension are good guesses.

How old (years and miles) are the tires?