I picked up a set of custom rims from a buddy last week. Really nice rims. They have M715 centers welded into 16.5 x 10" tubeless rims. the back space is the same as stock rims. The width moves to the outside edge of the rim. I have been studying these and it looks like I can go pretty big on tire size. Researching the old sites show that 37" is the largest that can be used on the stock rims. Would that apply to these as well. There seems to be a ton of space under there. I found a killer deal on a set of 42 x15.5 x 16.5's. Any ideas if these would fit?

Thanks,
VaM715