wondering who is running 165R 15 on full size cars (post 1940). (I have had them on a Model A but that is to light to compare. I need to replace my 6.00 x 15 bias plys on my 51 chevy with radials to keep the car from wondering in the NW Freeway ruts. or similar narrow tire (Hoosier ??) The 6.00 at 26" tall I am looking at either 165R 15 or 195/70/15 radial the 165R are 25.25 tall about 4.5 tread width the 195/70 are 26.25 tall (?? tread width) I really do not need to go shorter as I am down pretty low now (no airride) but I like the narrow tread of the 165R, the 195 are taller but I then have to deal with the wider tire (can not find info on actual tread width, only overall width) if someone has a pair can you measure the tread width for me. What worries me is can the 165R handle the weight on the big car and how do they drive on the freeway (long distance especially since I drive the car to California in August).