[MAC71]

The original 8 lug wheels were 16.5 rims so when I bought new ones I decided to go with 17 X 9 in rims. I was going to use a load range D or E tire since what was on it was load range D. But the problem that I ran into was that the shortest load range D tire that was wide enough for a 9 in rim was a 265 75 r17. It fit just fine on the rear but hit the finder just behind the front bumper. We tried a 245 tire but it would not seat on the rims. I ended up using standard load 275 60R17 tires.
I also have a 71 P/U truck and with 275 60 R15 tires on 8 in rims it handles much better over a stock sized rim/tire combination. But on the Suburban it handled awful. I think that the problem is that the tires side wall is just to soft for the weight of the Suburban. Also this is a C-20 with a 402 TH 400 and a dana 60. If you drive behind the Suburban you can see it bouncing on the tires, even if you over inflate them and drive behind it, it looks like the tires are under inflated.
Still have this problem and I am considering changing rims again. Was thinking of going to the late model 2500HD rims. Unsure what tire will fit the best on this truck with that rim. Any one know?