tires on stock rims???

if i am fitting 33x12.5" wide tires on my 7" wide stock rims right now with 1.25" wheel spacers and they fit fine and look alright does that mean that i can fit 35x12.5" wide tires on the same stock rims without any problems and use the same wheel spacers?

Their the same width so it should be the same

yeah, thats what i figured i just thought i would ask because i thought that they might not be as stable with the added hight on a such a narrow rim, or that the backspacing might not be enough with the added hight?