Suggestions to fix tire cupping noise in 2014 Mazda 6?

I have a 2014 Mazda 6 with about 15700 miles on my tires. Two weeks back I hit a curb on the right side while exiting a parking lot. Since then I hear a vibrating noise when most heard between 20 - 45 MPH. Took the car to my dealer and firestone, both told me that there is mild cupping on one of the tires. They told me that unless I get the tire replaced there is no way to eliminate the noise. I got all suspension parts checked (everything is good) and got my alignment, balancing and tire rotation done.
So is replacing the tire the best option? I was really advised against this since the tread is good.
So is replacing the tire the best option? I was really advised against this since the tread is good.
0
Answers
This may vary with different tires.
I'd recommend you post your question in Tires, Tires, Tires
http://forums.edmunds.com/discussion/723/general/x/tires-tires-tires/p244
and see if some of the several posters there have more guidance for you. There
is one who used to answer tire questions regularly, Capriracer. He may know
more or some of the others there may help.
2014 Malibu 2LT, 2015 Cruze 2LT,
CX5T_Lover