You have a balance issue. Whether its the wheel/tire that youre using as a replacement or the face that you have mismatch on the drive sets. Try putting it in the rear, like the kid suggested and if that doesnt work have it checked for balance/flat spots.
If its neither of those, you may have bent something when you hit the curb - head to the alignment shop. I say do this last, because its the most expensive of the 3
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