My original set was the Goodyear RFT also. It was noisy but batter that my 19" now.
My tyre constantly have a 'roaring' wind like sound like those army truck in the highway, but of couse softer la. It start at 40kh/h and taken over by normal tyre sound when speed reach 100kmh.
I bought my rims from ' lim tayar' & they said it is normal since the back tyre now saiz at 275/35/19. Should sound louder.
I still feel very disappointed as I sent my car to 2 others tyre shop and both come with different expenation but no solution. Hopefully got bro. here with 19" rim can share their experiences. Thank you.