My main concern with the factory Rig is that it has the D44/D70 combo with 6 lug Duel wheel rim's . . .
I was thinking of swapping some D60/D70 or D70/D70 axles under a factory dually but my goal isn't really to carry a heavier load the 8600lb GVWR is just fine, my 95' K2500 this FSJ will be replacing is rated for the same 8600lb GVWR . . .
I just wanted to end up with 8 lugged dually hub's so i could swap from 16's to 19.5's
7.50-16 = 32.2"
235/85R16 = 31.8"
225/70R19.5 = 32.5"
So there should be plenty of clearance right only about .5-.75" taller in the over all diameter basically the 255R19.5 is meant to replace the 16's, so now instead of load range D biasply's or load range E radial's i have load range F's . . .
By having the shorter side wall makes it more stable and with the heavier load rage means i'll be using less of the tires max load also increasing safety and gaining some extra tread life which is good for me cause i use MT & traction type tires . . .
The 225/70R19.5F's i want to use on this truck:
32.5" x 8.2" tire shown on 19.5 x 6.75 10 lug rim i believe i'll be using the 19.5 x 6.0" 8 lug rim not sure if i'll go steal or alloy . . .
1953 Studebaker M275.
1962 GMC 4500.
1969 AMC AMX.
1977 Ford F-350.
1982 AMC/Jeep J/20 Honcho.
1988 AMC/Jeep V8 Comanche.
1992 Trans AM GTA.