I replaced the tires on both my 64 GMC 6000 and my 56 Chevy 6100 with 9.00 R 22.5s they are a little bigger than the 8.25 20s that came on the 64 and the 8.00 22.5s that came on the 56.
The new tires on the 64 maid a word of difference for that truck could not have been happier. As far as the 56 goes I do not yet know as it is not finished. I do have to say the 9.00 20s are as big as the front of the 56 can handle.
If you could do your 64 GMC over again, you'd stick with the 9R tires? I've seen a few trucks with both 9 and 10R. Like I said, the extra road speed would be nice, but it has to be able to stop too. I don't want to get into 10Rs and it end up being too much.
Do you have photos of your 64? I'd like to see that truck.
I would prefer to gain the benefits of a radial tire.
Thanks for sharing.
Jonathon
