The diameter of the tires is the same so it won't cause a problem with binding when in 4WD, the only problem might be with clearance when turning sharp with the MMM, if I remember correctly mine are close, but I don't think they are close enough that 1/2 inch on the width on each side of the tire will matter, of course some tires measurements do not actually match the numbers printed on the sidewall. If you have bar tires on now, I would just check the clerance they have with the wheels in all directions and if there looks to be clearance, do it.