One of my Good Year GSA 37/17/12.5 tires has gone bad. The shop just found severe cupping, requiring extraordinary balancing, after a rotation. The shimmy over 60 MPH is annoying! All the others are in great shape, with plenty of miles left, assuming I take proper care of them.
If anyone has a used tire(s) in good shape, please let me know!!!

 

Unfortunately the GSA tire is really bad about cupping. I thought Goodyear quit making the GSA several years ago.

 

I do remember that you mentioned the cupping of the GSA in a previous post a few months ago. I didn't really notice it until I had it rotated to the front. It's OK around town, but on the highway-different story!
Right now, I'm having difficulty finding another tire, even used...