Hi , I am looking to get either 12.5 - 15-29 or 15.5- 15 -29 to replace the M.T. 15.5 that I have on my 1934 chevy coupe. The M.T.'s ride way to harsh and I am told the Hoosiers have a much better ride. Which tire would give me a softer ride 12.5 or 15.5? Car is used just for cruising and looks. I have 11 in. rims Thanks Jim